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Byju's Answer
Standard XII
Physics
Stopping Potential vs Frequency
25.How many p...
Question
25.How many photons of light frequency 5 x 10 raise to 15 (per second )can provide 6 joules of energy?
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Similar questions
Q.
Monochromatic light of frequency
6
×
10
14
Hz is produced by a laser. The power emitted is
2
×
10
−
3
W
(i) What is the energy of the photon in the light beam?
(ii) How many photons per second, on an average are emitted by the source ?
Q.
Monochromatic light of frequency of
6
×
10
14
H
z
is produced by a laser. Power emitted is
2
×
10
−
3
W
.
Approximately how many photons per second are emitted by the source?
Q.
Estimate how many visible light photons a
120
W
light bulb emits per second. Assume the bulb has an efficiency of about
5
%
.
(
λ
=
500
nm
,
h
=
6.63
×
10
−
34
Joule-sec
)
Q.
Monochromatic light of frequency of
6
×
10
14
H
z
is produced by a laser. Power emitted is
2
×
10
−
3
W
.
Approximately how many photons per second are emitted by the source?
Q.
How many photons of light having a wavelength
4000
˚
A
are necessary to provide
1.00
J
of energy?
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