The momentum of a photon in an X-ray beam of 10⁻¹⁰ metre wavelength is(a) 1.5×10⁻²³ kg -m/sec(b) 6.6×10⁻²⁴ kg -m/sec(c) 6.6×10⁻⁴⁴ kg -m/sec(d) 2.2×10⁻⁵² kg -m/sec
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Answer:b
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