Multiple Choice
A focused 100 W spotlight delivers 50% of its light into a circle with a diameter of 50 cm.What is the average rms electric field in this illuminated area?
A) 150 V/m
B) 190 V/m
C) 250 V/m
D) 310 V/m
E) 440 V/m
Correct Answer:
Verified
Correct Answer:
Verified
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