The radius Ans : [CBSE 2015] The images formed by two parallel plane mirrors will be infinite. The principal focus of a concave mirror is the point where rays that are parallel and close to the principal axis converge after reflection. 4. 1) Light :-. 15. . (iii) Draw two rays in the above diagram to show (how light reaches our eye from the object placed in water). 20. There are many surfaces that show reflection but not all surfaces show reflection. 38 terms. Science Chapter 10 Light Reflection and Refraction Class 10 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers. an hour ago. That is , ∠i = ∠r . Reflection of light can be seen in shaving mirrors and driving mirrors. 15. Physics. iii) Light travels in straight line. Question 3. A spherical mirror is that mirror whose reflecting surface is the part of a hollow sphere of glass.The spherical mirrors are of two types: Concave mirror and Convex mirror.Concave: A concave mirror is that spherical mirror in which the reflection of light takes place at the concave surface (or bent-in surface . Magnifying Lens is Refraction Center of curvature: The center of the sphere which mirror is a part is center of curvature. The spherical mirror with reflecting surface is curved _________ is called as concave mirror. Answer: A ( Luminous object) Question 3: The angle between incident ray and the plane mirror is equivalent to 60°. Question. This process is known as refraction . 17. Save. application of refraction of light in our daily lifeqatar airways doha to jfk flight status strike - troubled blood tv release date certificate of good standing colorado search 17.Write two uses of concave mirror. 3. Slide 16 of 75 of Reflection and refraction. (b) Give the angle of incidence and reflection for normal incidence. The principal axis is the parallel line (pc) from the pole to the centre of curvature. All of these results are consistent with the conclusions drawn from the ray diagram. An object 1cm high produces a real image 1.5 cm high, when placed at a distance of 15 cm from concave mirror. • E.g. If an object is placed at the focus of a concave mirror, where is the image formed? It is used by the dentists to see the images of teeth. These Light Reflection And Refraction MCQ have been prepared by expert teachers and subject experts based on the latest syllabus and pattern of term 1 and term 2. The MCQs for Grade 10 Light Reflection and Refraction have been updated based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS. May 09. Concave mirrors can be used as a shaving mirror or make up mirror. Answer: C (60°) Question 4: A Ray of light is incident on a plane mirror constructing an angle of 90° with the mirror surface. What is the angle of reflection? What should be the position of the object when a concave mirror is to be used: (i) as a shaving . Image Formation by Spherical Mirrors 4. Shaving Mirror is Reflection Reflection occurs when light traveling through one material bounces off a different material. The bouncing back of a ray of light in the same medium after striking on a surface of an object. However, with just a little guidance, students can look at light and identify whether it refracts or reflects. The image is located on the other side of the mirror since reflected rays diverge upon reflection; when mirrors produce images on the the opposite side of the mirror, the images are said to be virtual. Path of these rays after refraction: In case of convex lens, the first ray will pass through the principal focus on the other side of the lens. It is used shaving mirrors and make-up mirrors to see a large image of the face; It is used by dentist to see the large images of the teeth of patients. For Ex:- Casting of shadows of objects by Light Nature of Object Anything which gives out Light rays (either its own or Reflected by it) is called an Object When light falls on the surface of an object, it may be Absorbed Transmitted Reflected There are three types of object on the basis of reflection & refraction of light Transparent Object 3 laws of reflection of light what is questlove's real name . Light Reflection And Refraction Class 10 Physics Worksheet Pdf. 11. The path of the reflected ray is shown in Fig. This helps in providing a better and bigger view of the face and helps in shaving. Draw the corresponding ray diagram. Explanation: A shaving mirror is a small, often round, mirror that can be moved out from a wall, and which you use to see your reflection when you are shaving your face. - v/u = h'/h , -v/-15 = -1.5/1. Name a mirror that can give an erect and enlarged image of an object. Right Angle Mirrors PHYSIC TERMS. 10. The problem of spherical aberration are caused by the inability of the outer portions of a concave spherical mirror to reflect and focus light to the same image locations as other portions of the mirror. called a focus. Question 13. SkylarRogenski. (3) It is used by dentists and ENT specialists to see larger images of teeth and inner parts of ear and throat. . For concave mirrors, following rules are used: Rule 1st:- A ray of light which is parallel to the principal axis of a concave mirror, passes through its focus after reflection from the mirror. When u is changed, v . The reflecting surface of a spherical mirror may be curved inwards or outwards. The phenomena is called reflection. Representation of Images Formed by Spherical Mirrors Using Ray Diagram - 4 Questions (2 short, 2 long) 5. Rule 2nd:- A ray of light passing through the centre of curvature of a concave mirror is reflected back along the same path. REFLECTION. Convex mirrors are used extensively as . (iv) as a shaving mirror 13. Reflection Reflection occurs when light traveling through one material bounces off a different material. The image is 5.3 cm high, virtual, upright compared to the object, and 4.0 cm behind the mirror. Very large concave mirrors are used to focus the sunlight in solar furnaces. If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f Ans . It is used as a shaving mirror to see a larger image of the face when held close to the face. Question 4. 0. When the object is kept close to the concave mirror, between its pole and focus, as is done while shaving, the image formed is virtual, erect, and enlarged. 9 terms. Virtual and Erect 2 terms. Answer: At infinity. Problem 11: Every morning Bob Gillette uses a shaving mirror with a focal length of 72 cm to view the image of his face. When the concave mirror is placed at a distance less than its . The middle image is an upright image. Giving reason answer the following. In a spherical mirror the radius of curvature is twice the focal . b. Convex mirrors form diminished images. ; Aperture: The effective length of the mirror is aperture. Question 1. "Reflection is the bouncing back of light rays on striking the surface". (1) Used as reflectors for automobile headlights. Played 0 times. 13. Mirrors, like with Aluminum: reflect (elastically scatter) most visible light refract (inelastically scatter) most non-visible light focusmae. Moreover, they give a wider field of view enabling the driver to see the traffic behind them. The magnification of the middle image is -1. (b) It is a combination of convex mirror (small head) and plane mirror (legs of normal size). (a) Form the image in case an object is moved from infinity to the concave mirror. Concave mirrors are used as reflectors in car head-lights, search-lights, torches and table lamps. Reflection is just a "bouncing" back of an image, while refraction is a change of direction of an image. Concave mirrors are used as shaving mirrors to see a large image of the face and make a good shave. The centre of the sphere, of which the mirror is a part, is called the centre of For each concave mirror you perform the experiment of image formation for three values of object distance of 10 cm, 20cm and 30 cm. Answer : Incident ray - light which falls on the mirror/ polished surface is called incident ray. Answer: C. Look at yourself in a plane mirror and you see your image - it is upright. ii) Concave mirrors are used for shaving as it gives a magnified and erect image of the face. Reflection of Light: When light falls on a surface and is reflected back into the same medium, we say reflection has taken place. (a) A ray of light strikes the mirror at an angle of 20 0. The middle image is a real image. The reflected image is magnified but the field of view is limited. 1. What would be the refractive index of water with respect to glass? In a convex mirror, rays of light parallel to the principal axis after . A curved mirror is a glass piece with curvature and one side painted with mirror polish. magnetic effects of electric current. When sighting at the middle image, light will reflect twice prior to reaching one's eye. Ans. Draw the path of the reflected ray. length. Uses of a Convex Mirror. i) Convex mirrors are used as rear-view mirrors in vehicles because they form a virtual, erect, and diminished image of the objects placed in front of them. In solar furnaces, large concave mirrors are used to concentrate sunlight to produce a large amount of heat. a convex mirror (c) a concave mirror (d) a shaving mirror. A convex mirror is a spherical reflecting surface that bulges towards the source of light. Waves can be reflected from plain and curved surfaces, and the angle of incidence to the normal is always equal to the angle of reflection. They are used as shaving mirrors to see larger image of the face. Shaving mirrors to see larger image of the face, dentists use them to see larger images of the teeth and torch lights . Light-Reflection and Refraction CLASS 10 SOLUTIONS PART-I IMPORTANT AND FREQUENTLY ASKED QUESTIONS IN BOARD EXAMINATION. This property of waves is called refraction and commonly occurs . REFLECTION AND REFRACTION • The process of sending back the light lays which falls on the surface of an object called Reflection of light. Please download and view here. Reflection • It is the sent back of light at an interface between two media into the first medium. 30°. The net angle between incident ray and reflected ray will be. . Refraction Free download NCERT Solutions for Class 10 Science Chapter 10 Light Reflection and Refraction PDF in Hindi Medium as well as in English Medium for CBSE, Uttarakhand, Bihar, MP Board, Gujarat Board, and UP Board students, who are using NCERT Books based on updated CBSE Syllabus for the session 2019-20. The reflected light still travels in a straight line, only in a different direction. Answer: (i) n = speed of light in air/speed of light in liquid n = 3 × 10 8 /2.0 × 10 8 n = 1.5 (ii) n = sin I / sin r ⇒ sin r = sin r = sin 40° / 1.5 (which is 25°) (iii) Question 12. 0°. 10th grade . Answer : The ratio of sin of angle of incidence to the sin of angle of refraction for a light of given colour and for a given pair of media is constant. Side Mirror is Reflection Reflection occurs when light traveling through one material bounces off a different material. Edit. Pole: The center of the mirror is pole.We denote it by 'P'. Laws of Reflection : (1) Angle of incidence is equal to the angle of reflection. 10 LIGHT : REFLECTION AND REFRACTION 1) Light :- Slide 3 2a) Reflection of light :- Slide 5 3) Spherical mirrors :- 4) Terms used in the study of spherical mirrors :- Slide 8 5) Reflection by spherical mirrors :- ii) In a concave mirror a ray of light passing through the . Sets with similar terms. They are: Principal axis: Pole and center of curvature is joined by a line called principal axis. light reflection by mirrors 5. light- reflection and refraction. A prism, for example refracts or bends light to create a rainbow. 18. Light - Reflection and Refraction Plane Mirror Diffuse Reflection If the surface is not a plane surface, then the reflected rays are not parallel to each other. Answer: (A) When light falls on a highly polished surface like mirror, reflection occurs. We have given these Light Reflection And Refraction MCQ Class 10 Science Questions with Answers to help students understand the concept. An object placed 20cm in front of a mirror is found to have an image 15cm (i) in front of it (ii) behind the mirror. The distance between the object and image will be (a) 0.25 m (b) 1.0 m (c) 0.5 m (d) 0.125 m Answer/Explanation MCQ On Light Class 10 Question 2. Refraction is the change in speed, direction and wavelength of waves as they cross the boundary between two media of different densities. Concave mirrors are commonly used as shaving mirrors or by dentists and even in telescopes. This process is called reflection . <br> (i) For the three obuject distances, identify the mirror mirrors which wil form form an image of magnification -1. Spherical mirror. Shaving mirror, dentist mirror: 1.) (4) Large concave mirrors or parabolic mirrors are used in solar . If reflection takes place from inside, it is said to be concave mirror, and if the reflection takes place from outside surface it is a convex mirror. When the light gets reflected off its . Refraction Of Light. Mr . Two rays choose for refraction: (i) A ray of light parallel to the principal axis. When a photon hits a mirror, three things can happen, elastic scattering (reflection), inelastic scattering (refraction), or absorption and re-emission (that is how visible light is re-emitted from non-conductors). The radius of curvature of a spherical mirror is 20 cm. Beam: A beam is a bundle of rays, which originates from a common source and travels in the same direction. Mirror Formula and Magnification - 2 Questions . List the sign conventions for reflection of light by spherical mirrors. But when a ray of light falls at the boundary of two dissimilar surfaces, it bends. . what type of wand does luna lovegood have. Answer. . . The mirror formula is , where the symbols have standard meaning. Practice Light Reflection And Refraction questions and become a master of concepts. Long Answer Type Questions. Light Reflection and Refraction Class 10 MCQ With Answers Pdf Question 1. Light-Reflecting from the Plane and Curved Mirror. Q.7. A convex mirror is also known as a curved mirror. A ray of light moving along the principal axis is falling on a concave mirror. 60°. . As convex mirror gives a wider field view of the approaching traffic it is used as a rearview mirror in vehicles. Question. 5) radius of curvature of the mirror. Mai 2022. dsm-5 criteria for substance use disorders: recommendations and rationale. Question. (2) Used as shaving mirror. 120°. However speed is inversely proportional to optical density of the medium. Refraction Refraction is the bending of light rays. Spherical Mirrors 3. (a) Reflection (b) Refraction (c) Absorption. To read light reflection and refraction we must be aware of some common terminology. . Link to More Information About . 3) size of the image 4) the focal length of the mirror. Concave mirrors can be used as a shaving mirror or make up mirror. reflected light reaches our eyes then we see the objects. We now define a few important terms used for spherical mirrors. PHYSICS ----Reflection and Refraction of Light DRAFT. B. Class 10 Physics students should refer to the following printable worksheet in Pdf for Light Reflection And Refraction in standard 10. All solutions are explained using step-by-step approach. This is called Snell's law. The incident ray, the reflected ray and the normal to the reflecting surface all lie in the same plane. Angle of incidence: The angle between incident ray and normal at the point of incidence is called angle of incidence ∠i . called a concave mirror. The centre of curvature ()C of a spherical mirror is the centre of hollow glass sphere, of which the given mirror is a part. by mazumder_tanubrata_81933. 2. The mirror equation, rearranged as in the first example, gives: Solving for the magnification gives: This gives an image height of 0.667 x 8 = 5.3 cm. Refraction of Light: When light travels from one medium to another it bends from its original path This phenomenon is called refraction. Suppose you have three concave mirrors A, B and C of focal lengths of 10 cm, 15 cm and 20 cm. answer choices . Also, state the values of angle of incidence and reflection in this case. (ii) the angle of refraction in the liquid. The angle of incidence is equal to the angle of reflection. State laws of reflection. Unlike mirrors, most natural surfaces are rough on the scale of the wavelength of light, and, as a consequence, parallel incident light rays are reflected in many different directions, or diffusely. Attempt Reflection And Refraction - MCQ Test (22-11-2017) | 30 questions in 30 minutes | Mock test for Class 10 preparation | Free important questions MCQ to study for Class 10 Exam | Download free PDF with solutions . (ii) The incident ray, the reflected ray and the normal to the mirror at the point of incidence all lie in the same plane. Reflection by spherical mirrors :- In a concave mirror a ray of light parallel to the principal axis after reflection passes through the focus. Incident ray, reflected ray and normal to the reflecting surface at the point of incidence lie in the same plane. 0. Laws of Reflection • Two laws which govern reflection of light 1. Reflection: When light falls on a surface, it bounces back to the medium. i) Light is a form of energy which helps us to see objects. 27 terms. focusmae. Concave mirrors are also called converging mirrors. When a beam of light is incident on a curved mirror, the rays are reflected or diverge from a point. Shaving mirror reflection or refraction - 11351431 edencarpenter77 edencarpenter77 23.02.2021 Science . Spherical Mirrors. <br> (ii) Out . When the face is held within the focus of a concave mirror (not on the focus) then the enlarged image . Solving the Light Reflection and Refraction Multiple Choice Questions of Class 10 Science Chapter 10 MCQ can be of extreme help as you will be aware of all the concepts. Advertisement aced52221 aced52221 Answer: Reflection. (B) Refraction of light occurs when light falls on a transparent medium like glass or water. This means that the ratio of the speed of light in air and the speed of light in water is equal to 1.33. Also Read: Concave Mirror and Lens. ccisd learning progressions / 3 laws of reflection of light. (ii) as side view mirror in vehicles. Wherever you may stand in front of mirror, your image is always erect & same sized, what type of mirror is it? Physics review 17-18. Define the term reflection. i.e., sin i/sin r = Constant The incident ray, refracted ray and the normal at the point of incidence lie on the same plane. Uses of convex mirror include diverging light beams as rearview mirrors in vehicles, production of magnifying glasses, and avoiding collisions inside buildings. When the concave mirror is placed at a distance less than its focal length from the face, a magnified erect image is produced. Light reflection and refraction Worksheet-17 . Convex Mirror. Answer : (a) (i) Face must be placed in between the pole and focus of the mirror so that enlarged, erect image of face can be formed. Normally, light travels in a straight line, and changes direction and speed when it passes from one transparent medium to another, such as from. Summary of the image formed by a concave mirror . How many images are formed by two parallel mirrors? What is its focal length? A cure for the problem involves the use of a mirror with a different shape in the regions far from the principal axis; a parabolic . 14. Similarly, the refractive index of crown glass, n g =1.52. Reflection of Light 2. Spherical mirror is a part of a sphere. But a wave of short wavelength can be well opproximated by the ray treatment. A plane mirror is a simple flat glass with a mirror polish on it. Audio Guided Solution Your browser does not support the audio element. In a spherical mirror, the centre point of the reflecting surface is 'pole' ()P. 2. 2. The refractive index of glass is 3/2 and refractive index of water is 4/3. vi) Focal length:-is the distance between the pole and principal focus (f). If a man's face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be. Find the position and nature of image of an object 5cm high and 10cm in front of a convex lens of focal length 6cm. (ii) At focus, because rays coming from the focus after reflection will become parallel. From the Table you can know that the refractive index of water, n w = 1.33. 0. That is why concave mirror is used as a shaving mirror also. 21. The refractive index of several media is given in Table 10.3. Image Formation by a Convex Mirror . PSEB 10th Class Science Important Questions Chapter 10 Light Reflection and Refraction. These are used to get powerful parallel beams of light in torches, searchlights and vehicles headlights, and they are often used as shaving mirrors to obtain a larger image of the face. 1) Identify the mirror 2) The nature of the image. It is used as reflections in torches, vehicle head-lights and search lights to get powerful beam of light. • The two important laws of reflection are given below as follows: o First law: The incident ray . They are used by dentists to see larger images of the teeth. 18. (ii) A ray of light passing through the optical centre of a lens. Answer: A. 0% average accuracy. Question 14. . (2) The incident ray, the reflected ray and the normal at the point of incidence, all lie in the same plane. It is used to see the image in a shaving mirror. Answer: A surface which reflects the light is called reflector. iv) The common phenomena of light are formation of shadows, formation of images by mirrors and lenses . Ans:The spherical mirror with reflecting surface is curved inwards is called as . Light Reflection And Refraction Class 10 MCQ With Answers Question 18. . When a ray of light falls on a mirror, its direction changes. Answer: Laws of reflection of light states that. Shaving mirrors: The concave mirrors are used as shaving mirrors. 2. Reflect is easier to understand than refract. application of refraction of light in our daily life application of refraction of light in our daily life. Similarly, if the reflective surface is curved outwards, it is a convex mirror. dgregoire21. Define the terms: a. Find the focal length of the mirror and the kind of mirror in each case. refers to the bending of light as it passes through a different . Use of Concave Mirror. . A convex mirror is used in vehicles for rear view because it gives an erect image of the object. If a man's face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be (a) 75 cm (b) 25 cm (c . Answer: Angle of incidence is equal to the angle of reflection. 12. principal axis behind the mirror called principal focus (F). The light is reflected at the same angle that it hits the surface. Ans : [CBSE 2011, 2012, 2013] Concave mirror 16. Bouncing back of light when it strikes on a polished surface like mirror. This test paper with questions and answers for Grade 10 Physics will be very useful for exams and help you to score good marks. 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