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The Experimental Setup

If the wavele...

Question

If the wavelength of electromagnetic radiation is doubled, what happens to the energy of photon?

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Solution

The energy of photon, $E = h ν = \frac{h c}{λ}$ where $h =$ Plank's constant, $c =$ velocity of light and $λ =$ wavelength.
Thus, $E \propto \frac{1}{λ}$
Hence, if the wavelength is doubled, the energy of photon will be half.

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