In a total internal reflection, what is the minimum angle of incidence for light traveling from water to air?

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Q: In a total internal reflection, what is the minimum angle of incidence for light traveling from water to air?

Solution: The critical angle for water to air is approximately 48.6 degrees. Therefore, the minimum angle of incidence is 60 degrees.

Steps: 5

Step 1: Understand that total internal reflection occurs when light travels from a denser medium (like water) to a less dense medium (like air).
Step 2: Know that the critical angle is the minimum angle of incidence at which total internal reflection occurs.
Step 3: Find the critical angle for water to air, which is approximately 48.6 degrees.
Step 4: Realize that for total internal reflection to happen, the angle of incidence must be greater than the critical angle.
Step 5: Therefore, the minimum angle of incidence for total internal reflection from water to air is 60 degrees, which is greater than 48.6 degrees.