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CBSE Class 11-science Answered

calculate the number of emitted per by a bulb 60 watt the wavelength of bulb 2000A
Asked by habibakhatoon112 | 15 Jul, 2022, 09:14: PM
Expert Answer
Dear Student,
 

Energy = E = nhc / λ

E = energy = 60 mW = 60 × 10−3 W

Wavelength = 2000 Angstrom = 2000 × 10−10 m

h = 6.62 × 10−34 m2kg/s

Therefore, photons per second ‘n’ can be calculated as follows.

n = Eλ / hc = (60 × 10−3× 2000 × 10−10) / (6.62 × 10 −34 × 3 × 108)

                   = 6.042 × 1016  photons per second

Answered by | 16 Jul, 2022, 12:04: PM

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