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>EXERCISE>Q 40

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Advantages of cassegrain telescope is/are

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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 41

A telescope with objective of focal length

60 cm

and eye piece of focal length

5 cm

is focused on a far distance object such that the parallel rays emerge from eye piece. If object subtends an angle

2 °

on objective, then angular width of the image is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 42

A telescope has an objective lens of focal length

200 c m

and an eye piece with focal length

2 c m

. If this telescope is used to see a

50 m

tall building at a distance of

2 k m

, what is the height of the image of the building formed by the objective lens?

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 43

Which of the following is not involved in Rainbow formation?

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

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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