Suppose that sunlight is incident upon both a pair of reading glasses and a pair of sunglasses. Which pair would you expect to be warmer, and why?
To identify that whether a pair of reading glasses or a pair of sunglasses becomes warmer when sunlight incident on it.
Answer to Problem 41A
A pair of reading glasses becomes warmer when sunlight incident on it because it allows the sunlight to pass through it by absorbing all its heat energy.
Explanation of Solution
Introduction:
A surface when subjected under the sunlight, either it reflects the incident sunlight or it absorb all its heat energy.
Sunglasses are helpful in protecting our eyes in sunlight by reflecting it. On the other hand reading glasses do not reflect the sunlight. Hence, a pair of reading glasses becomes warmer when sunlight incident on it because it allows the sunlight to pass through it by absorbing all its heat energy.
Conclusion:
Thus, a pair of reading glasses becomes warmer when sunlight incident on it.
Chapter 27 Solutions
Conceptual Physics: The High School Physics Program
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