| Consider the given statements. |
| I. An electron can absorbs a photon. |
| II. An electron can absorbs two photons (one after other). |
| III. A free electron cannot absorbs a photon |
| IV. A bound electron can absorbs two photons |
| (one after other). |
| Which of the above statement is correct? |
A) Only I
B) Only III
C) Only IV
D) Only II
Correct Answer: B
Solution :
A free electron cannot absorbs a photon. In an electron-photon collision, when electron is bound, i.e. within a metal surface, electron absorbs the photon and it cannot further absorbs photon.
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