Pravansu panda Asked a Question
November 24, 2021 11:26 ampts 30 pts
A bulb of 40 W is producing a light of wavelength 620 nm with 80% of efficiency then the number of photons emitted by the bulb in 20 seconds are (1eV 1.6x 10-19 J, hc 12400 eV Å)
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  • Shreyasi majumdar 1 thankyou
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    Shreyasi majumdar 1
    please accept my answer
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