82. A 200W sodium Street lamp emits yellow light of wavelength 0.6 micrometer . Assuming it to be 25% efficient in converting electrical energy to light , the number of photons of yellow light it emits per second is

82. A 200W sodium Street lamp emits yellow light of wavelength 0.6 mic

1.	82. A 200W sodium Street lamp emits yellow light of wavelength 0.6 micrometer . Assuming it to be 25% efficient in converting electrical energy to light , the number of photons of yellow light it emits per second is
Answer» 82. A 200W sodium Street lamp emits yellow light of wavelength 0.6 micrometer . Assuming it to be 25% efficient in converting electrical energy to light , the number of photons of yellow light it emits per second is

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82. A 200W sodium Street lamp emits yellow light of wavelength 0.6 micrometer . Assuming it to be 25% efficient in converting electrical energy to light , the number of photons of yellow light it emits per second is

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