The rate of lamp B if lamp A is rated 75 cd.
Answer to Problem 11SSC
The lamp
Explanation of Solution
Given:
Two lamps are illuminating a screen equally.
Distance of lamp A from the screen is
Distance of the lamp B from the screen is
Rate of lamp
Formula used:
The expression for illumination is given by
Here,
Calculation:
Illuminance by the lamp
Illuminance by the lamp
Since both the lamp illuminate a screen equally so
Substitute
The ratio
Therefore, rating of lamp
Since
Substitute
Conclusion:
Hence, the lamp
Chapter 16 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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