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The ratio of the energy of a photon with $λ =$ 150 m to that with $λ =$ 300 m is

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Correct option is A

E=hcλ⇒E1E2=300150=21

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The ratio of the energy of a photon with λ= 150 m to that with λ=300 m is

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The ratio of the energy of a photon with $λ =$ 150 m to that with $λ =$ 300 m is