Ratio of wavelengths of waves associated with
two moving particles A & B with kinetic energy
E & E, is 2 : 3 then E /E, is :
(1) 4:9 (2) 9:4 (3) 3:3 (4) 2:3
Answers
Answered by
0
Answer:
Correct option is
A
25:9
From de-Broglie's equation:
λ=
mv
h
⇒λ
2
=
m
2
v
2
h
2
⇒mv
2
=
mλ
2
h
2
∵KE(K)=
2
1
mv
2
∴KE(K)=
2
1
mλ
2
h
2
⇒
K
2
K
1
=(
λ
1
λ
2
)
2
=(
3
5
)
2
∴K
1
:K
2
=25:9.
Hence, option A is correct.
Similar questions