Physics

Problem

Flint glass exhibits dispersion: its index is

n=1.66

for violet light (

\text{wavelength }400\,\text{nm}

) and

n=1.62

for red light (

700\,\text{nm}

). For each wavelength, calculate the critical angle when light exits flint glass into air. Then find the difference between the two critical angles (violet minus red) in degrees.

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