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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 3.5 R

B

convergent lens of focal length 3.0 R

C

divergent lens of focal length 3.5 R

D

divergent lens of focal length 3.0 R

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A
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DISHA PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Exercise -2 : Concept Applicator
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  2. A concave lens of glass, refractive index 1.5 has both surfaces of sam...

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  3. The layered lens as shown is made of two types of transparent material...

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  4. In the displacement method a conves lens is placed in between an objec...

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  5. Light takes t(1) second to travel a distance x cm in vacuum and the sa...

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  6. A thin lens focal length f(1) and its aperture has diameter d. It form...

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  7. Two plane mirrors A and B are aligned parallel to each other, as shown...

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  8. A ball is dropped from a height of 20 m above the surface of water in ...

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  9. The size of the image of an object, which is at infinity, as formed by...

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  10. A parallel beam of light is incident from air at an angle alpha on the...

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  11. The focal length of the objective and the eye piece of a compound micr...

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  12. A vessel of height 2d is half-filled with a liquid of refractive index...

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  13. A printed page is pressed by a glass of water. The refractive index of...

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  14. A convex lens, of focal length 30 cm, a concave lens of focal length 1...

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  15. An object is located in a fixed position in front of a screen. Sharp i...

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  16. The image of an illuminated square object is obtained on a screen with...

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  17. An object is placed upright on the axis of a thin convex lens at a dis...

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  18. A ray of light is travelling from glass to air. ("Refractive index of ...

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  19. We wish to make a microscope with the help of two positive lenses both...

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  20. A ray of light passes through an equilateral prism (refractive index 1...

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