Energy of photon corresponding to visible light of maximum wavelenght is approximately

we have to calculate the energy of photon to visible light of maximum wavelegthwe know maximum wavelength λ =7500 ×10-10energy of photon  E = hcλwhere h = planks constant = 6.626×10-34 c = speed of light = 2.998×108 m/sand also 1ev =1.602×10-19therefore the energy in electron volt E = 6.626×10-34×2.998×1087500×10-10×1.602×10-19=1.6 evE=1.6 ev    ans...

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