Question

what is the specific value of angle i called
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Answer 1

The angle of incidence (i) at which light is totally internally reflected is known as the critical angle.

Explanation:

• In optical geometry, the angle that is formed by the ray of light that falls along the normal surface and the line perpendicular to the surface of the dense medium at the incident point is known as normal.
• It is represented by N.
• This ray can be formed by any wave such as microwave, X-ray , optical etc.
• The ray coming from rare medium (air) enters to dense medium (glass) making an angle θ with the normal line.
• The angle of incidence (i) at which light is totally internally reflected is known as the critical angle.

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What is the difference between refraction and reflection?

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Answer 2

The specific value of angle i called critical angle.

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