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A concave lens of glass, refractive inde...

A concave lens of glass, refractive index 1.5 has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a

A

Convergent lens of focal length `3.5R`

B

Convergent lens of focal length `3.0R`

C

Divergent lens of focal length `3.5R`

D

Divergent lens of focal length `3.0R`

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The correct Answer is:
A
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RESNICK AND HALLIDAY-GEOMETRICAL OPTICS : REFRACTION-Practice questions(single correct choice type)
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  3. A concave lens of glass, refractive index 1.5 has both surfaces of sam...

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  4. When an object is at a distance u(1) and u(2) from the optical centre ...

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  5. A concavo-convex glass (index=1.5) lens has radii of curvatures 60cm a...

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  6. Angle of minimum deviation is equal to the angle of prism A of an equi...

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  9. A prism is made of glass which has a higher index of refraction for vi...

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  10. The focal lengths of a convex lens for blue and red colors of light ar...

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  13. Focal lengths of two lenses are f and f' and dispersive powers of thei...

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  14. The table lists the index of refraction for various substances at 20^(...

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  15. What is the frequency of light that has a wavelength in water of 6.00x...

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  16. Blue light with a wavelength of 425 nm passes from a vacuum into a gla...

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  17. A child is looking at a reflection of the Sun in a pool of water. When...

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  18. A ray of light originating in oil (n=1.21) is incident at the Brewster...

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  19. A converging lens with a focal length of 12cm produces a 3cm light vir...

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  20. A camera with a focal length of 0.0500m (a 50mm lens) is focused for a...

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