A stationary hydrogen atom undrgoes a transition from n=5 to n=4. Recoil speed of the atom is (R=Rydberg constant, h=Planck's constant and m=mass of the proton.)

A stationary hydrogen atom undrgoes a transition from n=5 to n=4. Reco

1.	A stationary hydrogen atom undrgoes a transition from n=5 to n=4. Recoil speed of the atom is (R=Rydberg constant, h=Planck's constant and m=mass of the proton.)
Answer» `(Rh)/(m)` `(9m)/(400 Rh)` `(9Rh)/(400m)` `(7 Rh)/(400)` Solution :For transition`5rarr4`, MOMENTUM of PHOTON,`p=h/(lambda)=hR(1/16-1/25)` and RECOIL speed, `v=p/m=(hR(1/16-1/25))/(m)=(9hR)/(400m)`

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A stationary hydrogen atom undrgoes a transition from n=5 to n=4. Recoil speed of the atom is (R=Rydberg constant, h=Planck's constant and m=mass of the proton.)

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