Reflected light — UPSC Physics Optional CSE 2014 Paper I

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A mirror is moving through vacuum with a relativistic speed $v$ in the $x$ -direction. A beam of light with frequency $\omega_i$ is normally incident (from $x=\infty$ ) on the mirror.

(i) What is the frequency of the reflected light expressed in terms of $\omega_i$ , $c$ and $v$ ?

(ii) What is the energy of each reflected photon?

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Reflected light — UPSC Physics Optional CSE 2014 Paper I

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