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March 27, 2017

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A heat lamp produces 22.5 watts of power at a wavelength of 6.0 Mu.How many photons are emitted per second? (1watt= 1J/s )

  • College Chemistry - ,

    Please clarify Mu. Is that 6.0 microns = 6.0E-6 meters? If so then
    joules = hc/wavelength
    joules = 6.626E-34 x 3E8/6E-6 = about 3E-20 J but you need to do it more accurately. Then
    3E-20 J/photon x # photons = 22.5 J in 1 sec.
    Solve for # photons.

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