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JEEMAIN and NEET
>>
Physics
>>
Class12
>>
Dual Nature of Matter and Radiation
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Q)
The threshold frequency for a metallic surface corresponds to energy of
6.2
e
V
and the stopping potential for a radiation incident on this surface is
5
V
. The incident radiation lies in
(
a
)
U
l
t
r
a
v
i
o
l
e
t
r
e
g
i
o
n
(
b
)
I
n
f
r
a
r
e
d
r
e
g
i
o
n
(
c
)
V
i
s
i
b
l
e
r
e
g
i
o
n
(
d
)
X
−
r
a
y
r
e
g
i
o
n
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