Concept explainers
To calculate the distance from just above the spot to the strike point.
Answer to Problem 39P
Solution:
The required distance must be greater than 93.5 cm.
Explanation of Solution
Given Info:
Refractive index of water
Refractive index of air
Water depth ‘D’ = 82.0 cm
Let the angle of incident (critical angle)be
Let distance from just above the spot to the strike point be ‘d’
Angle of refraction
Formula Used:
Apply Snell’s Law
Here, all alphabets are in their usual meanings.
Calculation:
Apply Snell’s Law for water-air surface
Now, we shall calculate the distance ‘d’
Since the light should not exit from water, then angle of incident must be greater than to its critical angle. Hence, the required distance must be greater than 93.5 cm.
Chapter 23 Solutions
Physics: Principles with Applications
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