The discussion centers on the concept of total internal reflection and the relationship between the angle of incidence and angle of refraction. Specifically, it clarifies that for total internal reflection to occur at point B, the angle of incidence at point A must be just less than 90 degrees, despite an initial angle of incidence being 40 degrees. This is necessary to achieve the maximum angle of refraction at point B, which is crucial for understanding the principles of optics.
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Yes, that is obvious. But to get a possible total internal refection at B, you need a maximum angle of refraction, and therefore a maximum angle of incidence. So they observe ( correctlyellieee said:
!) that for a maximum angle of incidence at A##\ ##ellieee said:
just to clarify, is it maximum angle of refraction and incidence at B ?BvU said:
