A Nocturnal Bird's Eye Can to Detect Monochromatic Light of Frequency

question 4

Multiple Choice

A nocturnal bird's eye can to detect monochromatic light of frequency 6.38 * 10¹⁴ Hz with a power as small as 2.1 * 10^-17 W.What is the corresponding number of photons per second a nocturnal bird's eye can detect?

• A)30
• B)40
• C)50
• D)60
• E)70

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