user
A light ray travels from air (n=1.00) into a material with a refractive index of 1.50. What is the critical angle for the interface between these two media?
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

The answer is 42.

<|end_of_solution|>