The work function (
) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
Metal
Li
Na
K
Mg
Cu
Ag
Fe
Pt
W
2.4
2.3
2.2
3.7
4.8
4.3
4.7
6.3
4.75
The work function ( ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
|
Metal |
Li |
Na |
K |
Mg |
Cu |
Ag |
Fe |
Pt |
W |
|
|
2.4 |
2.3 |
2.2 |
3.7 |
4.8 |
4.3 |
4.7 |
6.3 |
4.75 |
Question ID - 101598 | SaraNextGen Top Answer
The work function ( ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
Metal
Li
Na
K
Mg
Cu
Ag
Fe
Pt
W
2.4
2.3
2.2
3.7
4.8
4.3
4.7
6.3
4.75
|
The work function (
|
1 Answer
127 votes
Answer Key / Explanation : (4) -
Energy of photon
For photoelectric effect to occur, energy of incident photons, must be greater than work functions of metal. Hence, only Li, Na, K and Mg have work functions less than 4.14 V.
127 votes
Answer Link
127