Dual Nature Of Light Question 273
Question: The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is [CBSE PMT 1999; KCET 2001]
Options:
A) 4125 Å
B) 2062.5 Å
C) 3000 Å
D) 6000 Å
Show Answer
Answer:
Correct Answer: C
Solution:
$ W.,(eV)=\frac{12375}{{\lambda_{0}}({\AA})}\Rightarrow {\lambda_{0}}=\frac{12375}{4.125}=3000{\AA} $
BETA
