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1. A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10-34 J sec.





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  • By: guest on 02 Jun 2017 12.51 am
    From Plank equation joule to convert it into electron volt it will be divided by 1.6 x 10-19.
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