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Q.

If the wavelength of electromagnetic radiation is doubled, what will happen to the energy of photons?

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a

Halved

b

Remains the same

c

Becomes zero

d

Doubled

answer is B.

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Detailed Solution

Energy of a photon,
E = hv = hc/λ.
E ∝ 1/λ.
When the wavelength of electromagnetic radiation is doubled, the energy of the photons is halved.

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