Ablue-green photon (λ = 488 nm ) is absorbed by a free hydrogen atom, initially at rest. what is the recoil speed of the hydrogen atom after absorbing the photon?

The recoil speed is

Solution:

Wavelength of a blue-green photon,

Now, the energy associated with the blue-green photon:

where

h = Planck's constant

C = speed of light ion vacuum

Also, we know that the recoil speed can be calculated by the KInetic energy which is equal to the Energy of the blue-green photon:

where

= velocity of Hydrogen atom

= mass of H-atom

Now,

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

i think its c if i'm wrong