Here's the cbse syllabus for magnetic effects of electric current
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Energy of single uv photon= 7.95 x 10⁻¹⁸ J
Energy of a mole of photons=4788213 J
Explanation:
the energy of a photon is given by
h= planck's constant=6.626 x 10⁻³⁴ Js
λ= wavelength=25 nm= 25 x 10⁻⁹ m
c= velocity of light= 3 x 10⁸ m/s
so
E=7.95 x 10⁻¹⁸ J
so energy of one photon=7.95 x 10⁻¹⁸ J
Energy of one mole of photons= 6.022 x 10²³ (7.95 x 10⁻¹⁸ J)
Energy of one mole of photons=4788213 J