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Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 2 (25 MCQs)

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1. Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
2. A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:
3. Under which of the following conditions a concave mirror can form an image larger than the actual object?
4. An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror or radius of curvature 30 cm. The position of the image is
5. A child is standing in front of a magic mirror. She finds the imageof her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
6. The magnification is always 1 for the following mirror
7. Which of these can be used to obtain a real image having the same size as the object?
8. What is the optical density?
9. An object is placed at a distance of 40cm in front of a concave mirror of focal length of 20cm.The image produced is
10. Which of the following factors contributes to the bending of light?
11. A concave mirror gives real, inverted and same size image if the object is placed
12. When a ray of light enters a glass slab from air-
13. If an object is placed at the focus of a concave mirror where is the image formed
14. The distant object method can be used to find the focal length of which of the following?
15. An object is moved at constant speed from infinity to the focus of a concave mirror:
16. Magnification has a plus sign, then the image is
17. The point on the spherical mirror at the middle of the surface is called
18. A ray of light coming parallel to the principal axis after passing through a convex lens, has passed through its
19. Focal length of a concave mirror is
20. Which of the following is true with respect to magnification of spherical mirrorsa. It is the ratio of height of object to height of imageb. It can be also expressed as negative ratio of image distance to object distancec. Magnification is always greater than zero
21. Reflection is when light .....
22. To get an image larger than the object, one can use
23. The mirror for which the magnification is always less than 1
24. The speed of light in vacuum is
25. According to New Cartesian Sign Convention:(a) focal length of concave mirror is positive and that of convex mirror is negative (b) focal length of both concave and convex mirrors is positive (c) focal length of both concave and convex mirrors is negative (d) focal length of concave mirror is negative and that of convex mirror is positive
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