If \(\phi\) is the work function of photosensitive material in Joules and light of wavelength of numerical value \(\lamb…
Q1
If \(\phi\) is the work function of photosensitive material in Joules and light of wavelength of numerical value \(\lambda =\frac{hc}{e}\) metre, is incident on it with energy above its threshold value at an instant then the maximum kinetic energy of the photo-electron ejected by it at that instant (Take h-Planck's constant, c-velocity of light in free space) is (in SI units) :
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