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A 100 W bulb is emmiting light of wav...

A `100` W bulb is emmiting light of wavelength `300` nm .Calculate the number of photon emitted by the bulb in `1` min?

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`100 W` bulb is emmiting `100 J` energy per second so energy emitted in `1` min is `100 xx 60 = 6000 J`
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Knowledge Check

  • A 100 watt bulb emit monochromatic light of wavelength 400 nm.Calculate the number of photons emitted per second by the bulb.

    A
    `1.765 xx10^(19) s^(-1)`
    B
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    D
    `3.012xx10^(20) s^(-1)`

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    B
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  • A bulb of 40 W is producing a light of wavelength 620 nm with 80% of efficiency , then the number of photons emitted by the bulb in 20 seconds are : ( 1eV = 1.6 xx 10^(-19) J , hc = 12400 eV )

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