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A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. Find the value of v. Mass of a hydrogen atom =1.67 xx (10^-27)kg. |
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Answer» Solution : The linear momentum of the PHOTON ` = H/ lambda = (6.63 xx (10^-34)Js/ 122 xx (10^-9)m) = 5.43 xx (10^-27)KG m (s^-1)` ` or, V = (5.43 xx (10^27)/ 1.67 xx (10^27))m (s^-1)= 3.25 m (s^-1). |
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