A hydrogen atom at rest emits a photon during its transition from n = 2 to n = 1.
Choose the INCORRECT statement

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De-Broglie wavelength of hydrogen atom during recoil will be same as wavelength of emitted photon.

Kinetic energy of recoil H-atom will be less than 10.2 eV

Energy of emitted photon will be less than 10.2 eV

Kinetic energy of recoil H-atom will be equal to energy of emitted photon.

answer is D.

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Detailed Solution

Since initial momentum is zero. So final momentum is also zero. So momentum of hydrogen atom and photon will be equal.

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