MCQ
If work function of metal is $3$ $eV$ then threshold wavelength will be ............ $\mathop A\limits^o $
- ✓$4125 $
- B$4000 $
- C$4500 $
- D$5000 $
✓
Answer
Correct option: A.
$4125 $
a
(a) ${\lambda _0} = \frac{{12375}}{{{W_0}(eV)}} = \frac{{12375}}{3} = 4125{Å}$
(a) ${\lambda _0} = \frac{{12375}}{{{W_0}(eV)}} = \frac{{12375}}{3} = 4125{Å}$
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