NEET Physics Atoms Questions Solved

Watch Physics > Atoms Videos
play button
NEET - 2012

An electron of a stationery hydrogen atom passes from the fifth energy level to the ground level.The velocity that the atom acquired as a result of photon emission will be

(a)24 hR25 m                                (b)25 hR24m

(c)25m24hR                                 (d)24m25hR

(m is the mass of the electron, R Rydberg constant and h Planck's constant)

Here, E5-E1=hcλ

and R hc25-R hc =hcλ

2425R=1λ

But              P=hλ

and            v=hmλ

                  =2425Rhm

Difficulty Level:

  • 48%
  • 27%
  • 19%
  • 8%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 21, 2019)