Physics-
General
Easy
Question
Figure shows a cross - section of light pipe made of glass fibre of refractive index 1.68. The outer coating of the pipe is made of a material of refractive index 1.44. What is the range of angles of the incident rays with the axis of the pipe for which total internal reflection inside the pipe takes place ?
- between 0º and 45º
- between 0º and 90º
- between 0º and 60º
- between 0º and 180º
The correct answer is: between 0º and 60º
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. will be equal to ____ degrees
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Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle with the first mirror. It is given that The net deviation produced after reflection once from each mirror is.
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