If the total energy transferred to a surface in time t is 6 . 48 × 10 5 J , then the magnitude of the total momentum delivered to this surface for complete absorption will be :

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As we know, p = E c , where c is velocity of light. Therefore, p = 6 . 48 × 10 5 3 × 10 8 = 2 . 16 × 10 - 3 kg m s - 1

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