Dual Nature Of Light Question 335
Question: The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein?s equation, the metals which will emit photo electrons for a radiation of wavelength 4100 Å is/are [CBSE PMT 2005]
Options:
A) None of these
B) A only
C) A and B only
D) All the three metals
Show Answer
Answer:
Correct Answer: C
Solution:
Energy of incident radiations (in eV) $ =\frac{12375}{4100}=3.01,eV $ Work function of metal A and B are less then $ 3.01eV $ , so A and B will emit photo electrons.
BETA
