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Statement-1 : The relative velocity of two photons travelling in opposite direction is the velocity of light.
Statement-2 : The rest mass of photon is zero.

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Both statements are true.

Statement-1 is true but statement-2 is false.

Statement-1 is false but satement-2 is true.

Both statements are false.

answer is A.

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Detailed Solution

As the rest mass of a photon is zero, it always moves with the speed of light.

And as we know that no material body can ever travel with a speed more than the speed of light in vacuum. Now as the two photons move with speed c of light opposite to each other, their relative velocity is also c.

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