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If 5% of the energy supplied to a bulb is radiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wave length of visible light as $5 .6 \times 10^{- 5} cm ?$

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detailed solution

Correct option is A

hν=hcλ=124205600ev=3.5485×10−19 Joule∴Number of photons emitted=100×0.053.5485×10−19=1.4×10−19

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If 5% of the energy supplied to a bulb is radiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wave length of visible light as 5.6 × 10−5 cm?

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

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If 5% of the energy supplied to a bulb is radiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wave length of visible light as $5 .6 \times 10^{- 5} cm ?$