In a sample of excited hydrogen atoms electrons make transition from `n=2` to `n=1.` Emitted energy.

(A) The electron in the hydrogen atom passes from energy level n = 4 to the n= I level. The maximum and minimum number of photon that can be emitted are six and one respectively. The photons are emitted when electron make a transition from the higher energy state to the lower energy state.

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 5 to an energy level with n = 3 ?

When a hydrogen atom emits a photon during a transition from n = 4 to n = 2, its recoil speed is about ,

A hydrogen atom emits a photon corresponding to an electron transtion from n= 5 to n = 1 . The recoil speed of hydrogen atom in nearly equal to