Dual Nature Of Matter Question 3
Question 3 - 2024 (27 Jan Shift 2)
The threshold frequency of a metal with work function $6.63 eV$ is :
(1) $16 \times 10^{15} Hz$
(2) $16 \times 10^{12} Hz$
(3) $1.6 \times 10^{12} Hz$
(4) $1.6 \times 10^{15} Hz$
Show Answer
Answer: (4)
Solution:
$\phi _0=h v _0$
$6.63 \times 1.6 \times 10^{-19}=6.63 \times 10^{-34} v _0$
$v _0=\frac{1.6 \times 10^{-19}}{10^{-34}}$
$v _0=1.6 \times 10^{15} Hz$
