Dual Nature Of Light Question 298

Question: If work function of metal is 3 $ eV $ then threshold wavelength will be [RPMT 2000]

Options:

A) 4125 Å

B) 4000 Å

C) 4500 Å

D) 5000 Å

Show Answer

Answer:

Correct Answer: A

Solution:

$ {\lambda_{0}}=\frac{12375}{W_{0}(eV)}=\frac{12375}{3}=4125{\AA} $