How Much Energy (In EV)does a Photon of Red Light

question 22

Multiple Choice

How much energy (in eV) does a photon of red light (l = 700 nm) have? (h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸ m/s,1 eV = 1.60 x 10^-19 J,and 1 nm = 10^-9 m)

• A)3.11 eV
• B)2.26 eV
• C)1.78 eV
• D)1.24 eV

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