The work function of a photoelectric material is 3.3 eV. The thre… - Vidyadip

MCQ

The work function of a photoelectric material is $3.3 \mathrm{eV}$. The threshold frequency will be equal to

A
$8 \times 10^4 \mathrm{~Hz}$
B
$8 \times 10^{56} \mathrm{~Hz}$
C
$8 \times 10^{10} \mathrm{~Hz}$
✓
$8 \times 10^{14} \mathrm{~Hz}$

✓

Answer

Correct option: D.

$8 \times 10^{14} \mathrm{~Hz}$

$v_0=\frac{W_0}{h}=\frac{3.3 \times 1.6 \times 10^{-19}}{6.6 \times 10^{-34}}=8 \times 10^{14} \mathrm{~Hz}$

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