Surface of certain metal is first illuminated with light of wavelength 
1=350mm and then, by light of wavelength 
2=54Dmm, it is found that the maximum speed of the photon electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to:
(Energy of photon=
eV)
|
a. |
1.8 |
b. |
1.4 |
|
c. |
2.5 |
d. |
5.6 |
Question ID - 50062 | SaraNextGen Answer Surface of certain metal is first illuminated with light of wavelength 1=350mm and then, by light of wavelength 2=54Dmm, it is found that the maximum speed of the photon electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to:
(Energy of photon= eV)
a.
1.8
b.
1.4
c.
2.5
d.
5.6
Surface of certain metal is first illuminated with light of wavelength 1=350mm and then, by light of wavelength 2=54Dmm, it is found that the maximum speed of the photon electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to:
(Energy of photon= eV)
|
a. |
1.8 |
b. |
1.4 |
|
c. |
2.5 |
d. |
5.6 |
1 Answer - 5876 Votes
= 
+
(2v)2
=
+
mv2
=
4
=3
=
1240
