The light enters the prism at angle a. Inside the crystal, the light is reflected from the back surface as shown in the picture. After the reflection, the light exits the crystal. What is the angle between the entering and exiting light beam?

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The light enters the prism at angle a. Inside the crystal, the light is reflected from the back
surface as shown in the picture. After the reflection, the light exits the crystal. What is the
angle between the entering and exiting light beam?
Transcribed Image Text:The light enters the prism at angle a. Inside the crystal, the light is reflected from the back surface as shown in the picture. After the reflection, the light exits the crystal. What is the angle between the entering and exiting light beam?
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