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Energy associated with a photon is 1.42 eV. Find wavelength of photon.

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+1 vote
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in Physics by (20.3k points)

Energy associated with a photon is 1.42 eV. Find wavelength of photon. (Take hc = 1240 nmeV)

(1) 628.26 nm 

(2) 873.24 nm 

(3) 625.22 nm 

(4) 820.23 nm

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1 Answer

+1 vote
by (19.5k points)

Correct Option is (2) 873.24 nm 

\(E= \frac{hc}{\lambda}\) 

\(\lambda= \frac{1240n meV}{1.42eV}\) 

= 873.24 nm

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