Question

The work function of a photoelectric material is 3.3 eV. The threshold frequency will be equal to

• A. $8\times {10}^{4}Hz$
• B. $8\times {10}^{56}Hz$
• C. $8\times {10}^{10}Hz$
• D. $8\times {10}^{14}Hz$

Answer 1

The correct option is D $8\times {10}^{14}Hz$

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