A Bulb Emits Light Of Wavelength 4500 Å. The Bulb Is Rated As 150 Watt And 8% Of The Energy Is Emitted As Light. How Many Photons Are Emitted By The Bulb Per Second?

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A bulb emits light of wavelength 4500 Å. The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?


Correct option is


lectrical energy in joules = Power in watts × Time in seconds 

Thus       150 watt = 150 joules of energy emitted per second.  







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