Values of work function (W₀) for a few metals are given below. |… | JEE Main 2023 Chemistry PYQ

NVAEasyJEE Main 2023 · 12 April, Shift 1Electromagnetic Radiation & Photoelectric Effect

Values of work function ( $W_0$ ) for a few metals are given below.

Metal	Li	Na	K	Mg	Cu	Ag
$W_0$ / eV	2.42	2.3	2.25	3.7	4.8	4.3

The number of metals which will show the photoelectric effect when light of wavelength $400 \, \text{nm}$ falls on it is _____.

(Given: $h = 6.6 \times 10^{-34}\,\text{J s}$ , $c = 3 \times 10^{8}\,\text{m s}^{-1}$ , $e = 1.6 \times 10^{-19}\,\text{C}$ )

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