Photon's of energy 6eV cause electrons to be emmmited from a certain metal with a 4eV work-function. If 3eV photons are indident on this metal which one of the following statements is true?
-No electrons will be emitted
-Electrons will be emitted with a maxium kinetic energy of 1eV
-Electrons will be emitted with a maxium kinetic energy of 7eV
-Electrons will be emitted with a maxium kinetic energy of 12eV
-Electrons will be emitted with a maxium kinetic energy of 0.75eV
2006-06-21 06:05:42 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
No electrons will be emitted.
In order for the electron to jump to a higher level, or for that matter, be removed all together, they must absorb a specific minimum amount of energy...anything less than this and nothing will happen.
If it takes 4 eV to remove the electron and it only absorbs 3 eV, the electron will not be removed.
2006-06-21 06:14:05 · answer #1 · answered by mrjeffy321 7 · 0⤊ 0⤋
The work function is how much energy it takes to free an electron. 3eV is not enough energy to free an electron if there is a 4eV work function.
2006-06-21 13:11:54 · answer #2 · answered by georgephysics13 3 · 0⤊ 0⤋
Since 3 is less than 4 no electrons will be emitted.
On a side note, you might try reading your physics book before doing your homework.
2006-06-21 13:17:40 · answer #3 · answered by ? 3 · 0⤊ 0⤋
-No electrons will be emitted
3eV < 4eV
2006-06-21 13:10:02 · answer #4 · answered by ag_iitkgp 7 · 0⤊ 0⤋