Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 41

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The total internal reflection of a beam of light occurs when beam of light enters- $[i_{c} =$ critical angle, $i =$ angle of incidence $]$

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Important Questions on Ray Optics

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 42

A bubble in glass slab

(μ = 1.5)

when viewed from one side appears at

5 cm

and

2 cm

from other side, then thickness of slab is:-

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 43

Alight wave travels from glass to water. The refractive index for glass and water are

\frac{3}{2}

and

\frac{4}{3}

, respectively. The value of the critical angle will be

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 44

The wavelength of light in vacuum is

6000 \overset{o}{A}

and in a medium it is

4000 \overset{o}{A}

. The refractive index of the medium is:

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 45

A beam of light is converging towards a point. A plane parallel plate of glass of thickness $t$ refractive index $μ$ is introduced in the path of the beam. The convergent point is shifted by (assume near-normal incidence):

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 46

When a beam of light goes from a denser medium

(μ_{d})

to a rarer medium

(μ_{r})

, then it is generally observed that the magnitude of the angle of incidence is half that of the angle of refraction. Then the magnitude of incident angle will be-

(

here

μ = \frac{μ_{d}}{μ_{r}})

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 47

To an observer on the earth, the stars appear to twinkle. This can be ascribed to,

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 48

The refractive index of a certain glass is

1.5

for light whose wavelength in a vacuum is

6000 \overset{o}{A}

. The wavelength of this light when it passes through glass is

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 49

When light travels from one medium to the other of which the refractive index is different, then which of the following will change?