A ray of light in air strikes a glass plate at an angle of incidence of . If the refractive index of the glass is and , what is for the refracted ray in the glass?
Answer and explanation
Correct answer: A. 0.33
- Step 1: Apply Snell's law of refraction: .
- Step 2: Substitute (air), , and : .
Answer
0.33.
Why not the others: '0.75' multiplies ; '0.25' squares the sine; '0.50' assumes no change in propagation direction.
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