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Question

Which of the following leads a photon to have greater energy?

A
A photon with a larger wavelength.
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B
A photon with a lesser speed than that of light.
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C
A photon with a smaller wavelength.
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D
By making the photon to move through a denser medium.
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Solution

The correct option is C A photon with a smaller wavelength.
We know that, energy of a photon is given by,

E=1240λ(in nm) eV

So, from the formula it is clear that, smaller wavelength of the photon results in greater energy.

Hence, option (C) is the correct answer.

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