The threshold frequency of a metal with work function 6.63eV is

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Solution

Q.
The threshold frequency of a metal with work function 6.63eV is [2024]

1 $16 \times 10^{15} H z$

2 $16 \times 10^{12} H z$

3 $1.6 \times 10^{12} H z$

4 $1.6 \times 10^{15} H z$

Ans.
(4)

$ϕ_{0} = h ν_{0}$

   $6.63 \times 1.6 \times 10^{- 19} = 6.63 \times 10^{- 34} ν_{0}$

   $ν_{0} = \frac{1.6 \times 10^{- 19}}{10^{- 34}}$

   $ν_{0} = 1.6 \times 10^{15} Hz$

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