Concept explainers
How does the intensity of light,
To explain: Effect on intensity of light, radiation and sound due to given condition.
Answer to Problem 9A
The intensity of light, radiation and sound becomes one-fourth of the original value.
Explanation of Solution
Given:
Point source is twice as far away that is
Formula Used:
The inverse square law is given as,
Calculation:
In a three-dimensional space, light, sound and radiation are evenly radiated outward from a point source. So, intensity of light, radiation and sound will follow inverse square law.
Since, distance is doubled that is
So, the effect on intensity will be
Conclusion:
Therefore, the intensity of light, radiation and sound becomes one-fourth of the original value.
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Conceptual Physics: The High School Physics Program
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