Question
Asked Feb 5, 2019
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A retina of a human eye can detect light when radiant energy incident on it is at least 4.0 x 10^-17 J. For light of 600-nm wavelength, how many photons does the correspond to?

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Expert Answer

Step 1

Relation between energy and wavelength:

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Step 2

From above formula we can calculate the energy of one photon.

According to question:

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Step 3

Plugging all values in th...

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