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A glass slab of thickness 4 cm contains ...

A glass slab of thickness `4 cm` contains the same number of waves as `5 cm` of water, when both are traversed by the same monochromatic light. If the refractive index of water is `4//3,` then refractive index of glass is

A

`(5)/(3)`

B

`(5)/(4)`

C

`(16)/(15)`

D

`(3)/(2)`

Text Solution

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. The time taken by a monochromatic light to travel a certain distance i...

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  2. A monochromatic light passes through a glass slab (mu = (3)/(2)) of th...

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  3. A glass slab of thickness 4 cm contains the same number of waves as 5 ...

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  4. A beam of light is partially reflected and partially refracted from a ...

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  5. A light ray is travelling from air to glass. True reflected and refrac...

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  6. An object is placed in front of a slab (mu=1.5) of thickness 6cm at a ...

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  7. A denser medium of refractive index 1.5 has a concave surface of radiu...

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  8. A point object is situated at a distance of 36 cm from the centre of t...

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  9. In a medium of refractive index 1.6 and having a convex surface has a ...

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  10. Light travels in two media A and B with speeds 1.8 xx 10^(8) ms^(-1) a...

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

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  12. In the figure shown, for an angle of incidence 45^(@), at top surface,...

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  13. A fish is a little away below the surface of a lake. If the critical a...

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  14. A parallel beam of monochromatic light falls on a combination of a con...

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  15. In question 118, if m(1) and m(2) are the magnifications for two posit...

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  16. Three lenses in contact have a combined focal length of 12 cm. When th...

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  17. A lens made of material of Refractive index mu(2) is surrounded by a m...

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  18. The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...

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  19. For a plano convex lens, the radius of curvature of convex surface is ...

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  20. A convex glass lens (mu(g) = 1.5) has a focal length of 8 cm when plac...

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