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Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 3 (25 MCQs)

Quiz Instructions

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1. An object is placed at the centre of curvature of a concave mirror.The distance between the object and its image is
2. Light traveling through the air moves in a straight line. An object viewed through water looks different because light rays that travel through water are-
3. Focal length of plane mirror is
4. The radius of curvature of a mirror is 20cm the focal length is
5. In which direction A Ray of light bends when it goes from water to glass?
6. A small air bubble in a glass block when seen from above appears to be raised because of
7. A real image of an object is to be obtained. The mirror required for this purpose is (a) convex (b) concave (c) plane (d) either convex or concave
8. 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
9. Where is the object placed in front of concave mirror to get virtual image?
10. Why the rear-view mirrors in vehicles are convex mirrors?
11. Which of the following characteristics are correct for the image formed in a plane mirror?I. Upright II. InvertedIII. Real IV. Same size as the objectV. Virtual
12. The path along which light travels in a homogeneous medium is called a-
13. In order to obtain a magnification of, -0.75 with a convex lens of focal length 8 cm, the object should be placed:(a) at less than 8 cm (b) between 8 cm and 16 cm (c) beyond 16 cm (d) at 16 cm
14. What is the relation between radius of curvature R and focal length f of a mirror?
15. Describe an application of Snell's Law in real life.
16. If the image formed is always virtual, the mirror can be:(a) concave or convex (b) concave or plane (c) convex or plane (d) only conve
17. A lens of power +2.0D is placed in contact with another lens of power-1.0D, the combination will behave like:-
18. A concave mirror
19. Second law of reflection states that?
20. You are provided with two convex lenses of focal length 10 cm and 20 cm. Which of the among these two lenses will you suggest to obtain a greater convergence of the refracted light?
21. Refractive index of glass with respect to air is 1.5 and refractive index of water with respect to air is 4/3. What will be the refractive index of glass with respect to water?
22. Assertion:Convex mirror is used as a shaving mirror. Reason:Convex minor always forms an enlarged image.
23. A mirror magnifies the image of an object by minus 1.5 times. Which of the following is true about the image produced by the mirror?
24. Choose the correct option. In a concave mirror, the image formed is always bigger than the size of object when the object is placed:i) At principal focus ii) At centre of curvature iii) Beyond centre of curvature iv) Between pole and focus
25. The image formed by a concave mirror has the magnification of +3, then where was the object placed?
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