Physics · 2012
NEET 2012 · Prelims · Code A · Q40
Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The…
Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be $\displaystyle 3.57$ V. The threshold frequency of the material is :
Official answer
(1)
$\displaystyle 1.6 \times 10^{15} \mathrm{~Hz}$
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