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Question
Physics
Light of wavelength λ falls on a metal having work function hc/ λ0 Photoelectric effect will take place only if
Q. Light of wavelength
λ
falls on a metal having work function hc/
λ
0
​
Photoelectric effect will take place only if
3449
212
Dual Nature of Radiation and Matter
Report Error
A
λ
≥
λ
0
​
19%
B
λ
≥
2
λ
0
​
25%
C
λ
≤
λ
0
​
46%
D
λ
<
λ
0
​
/2
10%
Solution:
h
v
=
h
v
0
​
+
K
.
E
v
α
λ
1
​
⇒
λ
h
c
​
=
λ
0
​
h
c
​
+
K
.
E
∴
K
.
E
=
λ
λ
0
​
h
c
​
(
λ
0
​
−
λ
)
as
K
.
E
≥
0
⇒
λ
0
​
−
λ
≥
0
⇒
λ
≤
λ
0
​