A bulb emits light of wavelength \( \lambda=4500 A^{\circ} \). The bulb is rated as 150 watt and...

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A bulb emits light of wavelength \( \lambda=4500 A^{\circ} \). The bulb is rated as 150 watt and \( 3.8 \% \) of the energy is emitted as light. How many photons are emitted by the bulb per second?
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