A ray of red light, for which (n=1.54), and a ray of violet light, for which (n=1.59),

Question:

A ray of red light, for which $n=1.54$, and a ray of violet light, for which $n=1.59$, travel through a piece of glass. They meet right at the boundary between the glass and the air, and emerge into the air as one ray with an angle of refraction of $22.5^{\circ}$. What is the angle between the two rays in the glass?

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