Assertion :Mass of moving photon varies inversely as the wavelength. Reason: Energy of the particle $= m a s s \times (speed of light)^{2}$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
B
According to the De Broglie relation wavelength is inversely proportional to momentum.
ie $λ = \frac{h}{p} = \frac{h}{m v}$
Where $m$ =rest mass of the partical
So the wavelength is inversely proportional to the mass of the partical.

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