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A plano - convex lens is made of flint g...

A plano - convex lens is made of flint glass. Its focal length is

A

inversely proportional to the wavelength of light

B

longer for red than for blue

C

longer for blue than for red

D

the same for all colours

Text Solution

Verified by Experts

The correct Answer is:
D
Focal length of lens is independent of wavelength.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-RAY OPTICS-EXERCISE 1 (TOPICAL PROBLEMS)
  1. A plano convex lens is made of glass of refractive index 1.5. The radi...

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  2. At what distance from a convex lens of focal length 30cm an object sh...

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  3. A plano - convex lens is made of flint glass. Its focal length is

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  4. Distance of an object from a concave lens of focal length 20 cm is 40 ...

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  5. Where should an object be placed from a converging lens of focal lengt...

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  6. An object is placed at 10 cm from a lens and real image is formed with...

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  7. The real image which is exactly equal to the size of an object is to b...

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  8. A plano-convex lens of curvature of 30 cm and refractive index 1.5 pro...

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  9. The minimum distance between an object and its real image formed by a ...

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  10. A convex lens of refractive index 3/2 has a power of 2.5^(@). If it is...

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  11. Two thin lenses of focal lengths f(1) and f(2) are in contact. The fo...

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  12. Two thin lenses, one of focal length + 60 cm and the other of focal le...

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  13. A convex lens of focal length 40 cm is in contact with a concave lens ...

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  14. Two similar plano-convex lenses are combined together in three differe...

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  15. Two thin lenses of focal lengths 20 cm and 25 cm are placed in a conta...

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  16. We combined a convex lens of focal length f(1) and concave lens of foc...

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  17. For a normal eye, the least distance of distinct vision is……..and far ...

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  18. When we see an object the image formed on the retina is

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  19. The focal length of a normal eye lens is about

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  20. An object is placed at a distance u from a simple microscope of focal ...

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