Crown Glass Consider white light incident on a plate of crown glass. The angle of incidence is p. What is the difference in the angle of refraction between red (660 nm) and blue (470 nm) rays? y = 33.5 deg; red light n = 1.518; blue light n = 1.531. The ray now travels inside the glass. What is the minimum angle of incidence for the red ray to be totally reflected? (62) [
Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
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Index of Refraction of Diamond
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![**Crown Glass**
Consider white light incident on a plate of crown glass. The angle of incidence is φ. What is the difference in the angle of refraction between red (660 nm) and blue (470 nm) rays?
\[ \varphi = 33.5 \text{ deg}; \quad \text{red light } n = 1.518; \quad \text{blue light } n = 1.531. \]
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The ray now travels inside the glass. What is the minimum angle of incidence for the red ray to be totally reflected?
\[ (\varphi \geq) \]
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