Question

explain total internal reflections with expression??

Answer 1

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YOUR ANSWER

TOTAL INTERNAL REFLECTION OCCURS WHEN LIGHT FALLS AND ITS INCIDENT ANGLE IS GREATER THAN CRITICAL ANGLE OF THE MEDIUM

EXPRESSION:--
ANGLE I GREATER THAN CRITICAL ANGLE

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Answer 2

Hey Mate Here Is Your answer


Total internal reflection, in physics, complete reflection of a ray of lightwithin a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, total internal reflection takes place at the boundary between two transparent media when a ray of light in a medium of higher index of refractionapproaches the other medium at an angle of incidence greater than the critical angle. For a water-air surface the critical angle is 48.5°. Because indices of refraction depend on wavelength, the critical angle (and hence the angle of total internal reflection) will vary slightly with wavelength and, therefore, with colour. At all angles less than the critical angle, both refraction and reflection occur in varying proportions.

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