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Question
Physics
A hydrogen atom is in fifth excited state. When the electron jumps to ground state, the velocity of recoiling hydrogen atom is
Q. A hydrogen atom is in fifth excited state. When the electron jumps to ground state, the velocity of recoiling hydrogen atom is
3194
214
NTA Abhyas
NTA Abhyas 2020
Atoms
Report Error
A
1.1
m
s
−
1
19%
B
4.2
m
s
−
1
46%
C
8.4
m
s
−
1
11%
D
11.2
m
s
−
1
23%
Solution:
Δ
E
=
13.6
(
1
2
1
−
6
2
1
)
Δ
E
=
13.22
e
V
p
=
c
Δ
E
⇒
v
=
m
C
Δ
E
=
1.67
×
1
0
−
27
×
3
×
1
0
8
13.22
×
1.6
×
1
0
−
19
=
4.2
m
s
−
1