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Byju's Answer
Standard XI
Physics
Threshold Frequency
Work function...
Question
Work function of a metal is 2.51 eV. Its threshold frequency is
A
5.9
×
10
14
C
y
c
l
e
/
s
e
c
.
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B
6.5
×
10
14
C
y
c
l
e
/
s
e
c
.
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C
9.4
×
10
14
C
y
c
l
e
/
s
e
c
.
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D
6.8
×
10
14
C
y
c
l
e
/
s
e
c
.
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Solution
The correct option is
D
6.8
×
10
14
C
y
c
l
e
/
s
e
c
.
W
0
=
h
v
0
⇒
v
0
=
W
0
h
=
2.51
×
1.6
×
10
−
19
6.6
×
10
−
34
=
6.8
×
10
14
C
y
c
l
e
/
s
e
c
.
Suggest Corrections
3
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