Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 7

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A convergent beam is an incident on the concave mirror, what will be the nature of the image?

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Important Questions on Ray Optics and Optical Instruments

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 8

An object is at

20 cm

from a concave mirror of focal length

10 cm,

the nature of image is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 9

A ray of light takes

10^{- 9}

second to cross a glass slab of refractive index

1.5 .

The thickness of the slab will be

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 10

The time taken by a monochromatic light to travel a certain distance in air in

9 \times 10^{- 6}

seconds. The time taken by the light ray to travel the same distance in water of refractive index

\frac{4}{3}

is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 11

A monochromatic light passes through a glass slab

(μ = \frac{3}{2})

of thickness

90 cm

in time

t_{1} .

If it takes a time

t_{2}

to travel the same distance through water

(μ = \frac{4}{3}) .

The value of

(t_{1} - t_{2})

is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 12

A beam of light is partially reflected and partially refracted from a surface. The angle between reflected and refracted light ray is

90 ° .

If the angle of refraction is

30 °,

the angle of incidence is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 13

A small object is placed

20 cm

in front of a block of glass

10 cm

thick and its farther side silvered. The image is formed

22 cm

behind the silvered face. Find the refractive index of glass.

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 14

A glass slab of thickness

4 cm

contains the same numbers of waves as

5 cm

of water when both are traversed by the same monochromatic ray of light. The refractive index of water is

\frac{4}{3}

, what is that for glass?

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 15

Light travels with velocities

2 \times 10^{8} m s^{- 1}

and

2.5 \times 10^{8} m s^{- 1}

through two different media. The critical angle of the two media is