A light ray in air enters a glass slab at point a at, Ask an Expert

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A light ray in air enters a glass slab at point A at incident angle theta1 and then undergoes total internal reflection at point B,. What is the maximum value of theta1if the index of refraction of the glass is 1.4?

For the ray of light that goes from air to glass, how would its speed, frequency, and wavelenghth change (compared to those values in air)?

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