3. A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. Find the value of u.
Mass of a hydrogen atom = 1.67 x 10^-27 kg.
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3. A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. Find the value of u.
Mass of a hydrogen atom = 1.67 x 10^-27 kg.
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