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Q 3182880737.     How many photons of light having a wavelength
of `500 nm` would provide `1.2 J` of energy?
(`h = 6.63 xx 10^(-34) J s ; c = 3.00 xx 10^8 m s^(-1)`)
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)