Multiple Choice
The intensity of a light beam with a wavelength of 500 nm is 2000 W/m2. The photon flux (in number/m2 . s) is about:
A) 5 *1017
B) 5 * 1019
C) 5 * 1021
D) 5 * 1023
E) 5 * 1025
Correct Answer:
Verified
Correct Answer:
Verified
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