Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 4

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Ray diagram for rays before and after reflection is show in given figure, then mirror is

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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 5

For a concave mirror, paraxial rays are focused at distance

\frac{R}{2}

from pole and marginal rays are focused at distance

x

from pole, then

(R

is radius of curvature)

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 6

Find the nature of image when an object is placed at

2 f

from the pole of a convex mirror of focal length

f

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

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

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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