Question

In hydrogen atom, electron jumps from the 3'' orbit to the
1" orbit. The change in angular momentum is.............
(a) 105x10-54J b) 2-11X10-34 Js
(c) 3.16x104
(d) 4.22x103* Js​

Answer 1

Answer:

2.11 × 10^-34 js

Explanation:

clearly,

L = mvr= nh/2pi

angular momentum in 3rd orbit ...

=3h/2pi ...............(i)

angular momentum in 1st orbit....

= h/2pi ......................(ii)

On subtracting (i) and (ii) we get

3h/2pi -h/2pi

= 2h/2pi

=h/pi

=6.6×10^-34 /3.14

=2.11×10^-34 js