Why does diamong sparkle?

The diamond has a very high refractive index 2 . 45 and hence low critical angle (about 24 ° ) Apart from this, it is cut in a special manner so that most of the light incident on it any internal faces have a higher angle of incidence than its critical angle This makes the light suffers multiple internal reflections from its inner faces. This makes the diamond shine.

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 1

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A ray of light falls on a transparent sphere with center at $C$ as shown in figure. If refractive index of the sphere is $\frac{4}{3} .$ Then net deviation of the ray will be

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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>Assignment>Q 3

A point object is placed in front of a convex mirror of focal length

f_{0} .

Which one of the following graphs correctly represent the variation of magnification

(m)

of mirror with image distance

v

from the pole of mirror?

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

If a light ray enters in a glass slab, then it

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 5

A man was standing at distance equal to focal length

f

in front of a convex mirror. The image of a man will be formed from pole of mirror at a distance

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

A point object when viewed from two opposite faces of plane glass slab appears at a distance of

6 cm

and

9 cm

respectively. The thickness of glass slab is ( Take

{}^{a}μ_{g} = \frac{3}{2})

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

An object is placed at distance of

25 cm

from the first focus of a thin lens. If its real image is formed at distance of

9 cm

from second focus, then focal length of lens is

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

A ray of light propagates from a medium (refractive index

= 2)

into air. The value of critical angle for medium air interface will be

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

The focal length of a concave lens is

20 cm

and the size of the image formed is half of the real object. The object distance from the lens is

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

An equi-convex lens of focal length $40 cm$ is cut vertically into two equal halves as shown in figure. The new magnitude of focal length of each part of lens will be

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