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Q.

Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased, then

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a

p increases and E decreases

b

p decreases and E increases

c

Both p and E increase

d

Both p and E decrease

answer is A.

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Detailed Solution

As,   λ=hp

and   λ=h2mE

⇒  λ∝1p∝1E

So, when wavelength is decreased, both p and E increase.

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