Q155 / 160 · AP EAMCET 2025 (22 MAY SHIFT 2) · Physics

If the threshold wavelength of light for photoelectric emission to take place from a metal surface is $6250 Å$, then the work function of the metal is (Planck's constant $=6.6 \times 10^{-34} \mathrm{Js}$ )

A
$3.98 \mathrm{~eV}$
Correct answer
B
$1.98 \mathrm{~eV}$
C
$2.98 \mathrm{~eV}$
D
$4.98 \mathrm{~eV}$

Hence, the correct answer is option: 'B'.

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