
Concept explainers
The angle of refraction when light passes from air to glass with help of given figure 9.34 in the text.

Answer to Problem 5P
Angle of incident Angle of refraction 5o 3o 10o 7o 20o 14o 40o 27o.
Explanation of Solution
Calculation:
This is figure 9.34.
When we closely observe the figure, we can estimate the angle of refraction. So, we can see the following estimation as
Angle of incident Angle of refraction 5o 3o 10o 7o 20o 14o
Here, we can observe that as the angle of incidence increases, angle of refraction also increases. So, we can see that if we do the angle of incidence double, then, angle of refraction also be double.
Similarly, if we angle of incidence is 2×20o=40o, angle of refraction would be 2×140=28o.
When we see the figure, we can also get angle of refraction as approx. 27o. So, we can see that our estimation is very close to the actual result from the figure.
Conclusion:
Thus, angle of incident changes as the angle of refraction.
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Chapter 9 Solutions
Inquiry into Physics
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