Dual Nature Of Light Question 292
Question: The work function of aluminium is 4.2 $ eV. $ If two photons, each of energy 3.5 $ eV $ strike an electron of aluminium, then emission of electrons will be [AFMC 1999]
Options:
A) Possible
B) Not possible
C) Data is incomplete
D) Depend upon the density of the surface
Show Answer
Answer:
Correct Answer: B
Solution:
For emission of electrons incident energy of each photon must be greater than work function (threshold energy).
BETA
