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प्रश्न
Two isosceles right-angle glass prisms P and Q are placed near each other as shown in Fig. Complete the path of the light ray entering the prism P till it emerges out of the prism Q.
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उत्तर
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संबंधित प्रश्न
Total internal reflection occurs only when a ray of light passes from a ______ medium to a ______ medium.
Write the necessary conditions for the phenomenon of total internal reflection to
occur ?
The observation made by Swarali while doing the experiment is given below. Based on these write answers to the questions:
Swarali found that the light ray travelling from the denser medium to rarer medium goes away from the normal. If the angle of incidence (i) is raised by Swarali, the angle of refraction (r) went on increasing. However, after certain value of the angle of incidence the light ray is seen to return back into the denser medium.
Questions:
- What is the specific value of∠i called?
- What is the process of reflection of incident rays into denser medium called?
- Draw the diagrams of three observations made by Swarali.
The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles].
Define critical angle for a given medium.
Plot a graph between
Angle of incidence versus angle of reflection,
Plot a graph between
Sine of angle of incidence versus sine of angle of refraction,
Images formed by totally reflecting prisms are brighter than the image formed by ordinary reflected light, why?
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
For a ray of light, the critical angle is minimum when it travels from ______.
