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CBSE Class 11-science Answered

please help asap
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Asked by utkarshgupta64825 | 24 Aug, 2020, 06:17: PM
answered-by-expert Expert Answer
Energy of light is 60W=60J
Energy space of space one space photon equals hc over straight lambda space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator 6.64 cross times 10 to the power of negative 34 end exponent cross times 3 cross times 10 to the power of 8 over denominator 663 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 3 cross times 10 to the power of negative 34 plus 6 end exponent space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 3 cross times 10 to the power of negative 28 end exponent space straight J Number space of space phtotons space in space 60 straight W space is space fraction numerator 60 over denominator 3 cross times 10 to the power of negative 28 end exponent end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 20 cross times 10 to the power of 28 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 cross times 10 to the power of plus 29 end exponent
Answered by Ravi | 25 Aug, 2020, 06:11: PM

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