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प्रश्न
How does a ray of light bend when it travels from denser to rarer medium.
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उत्तर
When a ray of light travels from denser to rarer medium it bends away from the normal.
संबंधित प्रश्न
What is total internal reflection?
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.
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.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
Define critical angle for a given medium.
Name the factors affecting the critical angle for the pair of media.
A ray of light passes through a right-angled prism as shown in the figure. State the angles of incidence at the faces AC and BC.
Explain ‘mirage’ as an illustration of refraction.
What are the conditions to achieve total internal reflection?
Which of the following is used in optical fibres?
