Concept explainers
The change in brightness of the light.
Answer to Problem 7RQ
The brightness of light when a point source of light is moved twice as far away will be changed by
Explanation of Solution
The Inverse-square law states that the relation between the intensity of a specified quantity and the square of the distance between effect and cause will be inversely related to each other.
Since light is a transverse
Write the expression for the Inverse-square law.
Here,
From the above expression, the intensity of the light depends on the inverse of square of the distance between the source and the surface. As the distance between the source and the surface is increased by two times, so from the above expression the brightness of the light will be changed by
Conclusion:
Therefore, the brightness of light when a point source of light is moved twice as far away will be changed by
Chapter 7 Solutions
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