Physics · 2021
JEE Main · 25 February 2021, Shift 2 · Q13
The stopping potential for electrons emitted from a photosensitive surface illuminated by light of wavelength 491 nm is 0.710 V. When the incident…
The stopping potential for electrons emitted from a photosensitive surface illuminated by light of wavelength $\displaystyle 491$ nm is $\displaystyle 0.710$ V . When the incident wavelength is changed to a new value, the stopping potential is $\displaystyle 1.43$ V . The new wavelength is :
Official answer
(3)
$\displaystyle 382$ nm
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