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Question

The energy of photon of wavelength $λ$ is
$c λ / h$
$h λ / c$
$λ / h c$
$h c / λ$

A

c λ / h

B

h c / λ

C

h λ / c

D

λ / h c

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Solution

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Energy of photon = $\frac{h c}{λ}$
Hence, a photon with longer wavelenght will carry less energy.

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