Question

If angle of incidence to get light ray to undergo total internal reflection of AD is

Answer 1

Explanation:

total internal reflection takes place at the boundary between two transparent media when a ray of light in a medium of higher index of refraction approaches the other medium at an angle of incidence greater than the critical angle. For a water-air surface the critical angle is 48.5°

Answer 2

Answer:

greater than 45°

Explanation:

• that mean
• here 48° is the answer .
• greater than 45° is also can be answer.

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