Dual Nature Of Light Question 326
Question: If the work function of a photometal is 6.825 eV. Its threshold wavelength will be $ (c=3\times 10^{8},m/s) $ [Pb. PET 2000; BHU 2004]
Options:
A) 1200 Å
B) 1800 Å
C) 2400 Å
D) 3600 Å
Show Answer
Answer:
Correct Answer: B
Solution:
$ {\lambda_{0}}=\frac{12375}{6.825}=1813,{\AA}\approx 1800{\AA} $
BETA
