Sodium vapor light emits of light energy
A sodium vapor light emits 10 W of light energy. Its wavelength is 589 nm, and it spreads in all directions. How many photons pass through your pupil, diameter 4mm, in 1 s if you stand 10 m from the light?
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Write a letter to the editor on land pollution that threatens the health of individuals living in Guyana, and clearly define the problem.
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