The threshold frequency of a metal with work function 6.63 eV is: (a) 16 × 10¹⁵ Hz (b) 16 × 10¹² Hz (c) 1.6 × 10¹⁵ Hz (d) 1.6 × 10¹² Hz

Answer: (c). ν₀ = φ/h = 6.63×1.6×10⁻¹⁹6.63×10⁻³⁴ ν₀ = 1.6×10¹⁵ Hz So the answer is (c) 1.6×10¹⁵ Hz.

The threshold frequency of a metal with work function 6.63 eV is: | JEE Main 2024 (27 Jan, Shift 2)

Q50JEE Main 2024 · 27 JAN · SHIFT 2Easy

Photoelectric Effect: Einstein's Equation

The threshold frequency of a metal with work function $6.63\text{ eV}$ is:

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Answer: (c)

$\nu_0 = \dfrac{\phi}{h} = \dfrac{6.63\times1.6\times10^{-19}}{6.63\times10^{-34}}$
$\nu_0 = 1.6\times10^{15}\text{ Hz}$
So the answer is (c) $1.6\times10^{15}\text{ Hz}$ .

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