Question

Transparent material the diverges rays of light is A. convex lens B. concave lens C. glass slab D. prism 6. The position where image formed when object is placed in infinity in front of convex lens is is A) at F B) between F and C C) beyond C D) at C 7. One of the properties of concave lens is, it A. diverges the light rays B. forms real and inverted image C. is thinner at the edges and thicker at the middle D. converges the light rays 8. Position in which the object should be placed in front of the convex lens in order to obtain a virtual and erect image. A) at the optic center B) between 0 and F C) at principal F D) beyond 2F 9. Reciprocal of focal length is A. Power of lens B. Principal Focus C. Magnification D. optic centre 10. Focal length of the convex lens whose radius of curvature is 90 cm is A) 30 cm B) 60 cm C) 45 cm D) 90 cm 11. The phenomenon of bending of light as it passes from one transparent medium to another is A. refraction of light B. reflection of light C. internal reflection of light D. lateral inversion of light 12.A doctor prescribes a corrective lens of power ‒0.5D to a person. The focal length of lens and the type is A. ‒2m and concave lens B. +2m and convex lens C. +2m and concave lens D. ‒2m and convex lens 13.The nature and the size of the image formed when the object is kept between the principal focus ‘F1’ and optical center ‘O’ of a convex lens is A. virtual, erect and enlarged B. real, inverted and small size C. virtual, inverted and small size D. real, inverted and enlarged 14.The diameter of the circular outline of a spherical lens is A. optical centre B. centre of curvature C. aperture D. principal axis​

Answer 1

Answer:

Transparent material the diverges rays of light is A. convex lens B. concave lens C. glass slab D. prism 6. The position where image formed when object is placed in infinity in front of convex lens is is A) at F B) between F and C C) beyond C D) at C 7. One of the properties of concave lens is, it A. diverges the light rays B. forms real and inverted image C. is thinner at the edges and thicker at the middle D. converges the light rays 8. Position in which the object should be placed in front of the convex lens in order to obtain a virtual and erect image. A) at the optic center B) between 0 and F C) at principal F D) beyond 2F 9. Reciprocal of focal length is A. Power of lens B. Principal Focus C. Magnification

Answer 2

1. option b
2. option c
3. option a
4. option a
5. option b
6. option c
7. option d
8. option d
9. option d

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