Use the Planck Law formula to plot the energy emitted from a 100 W tungsten halo

Question

Use the Planck Law formula to plot the energy emitted from a 100 W tungsten halogen bulb as a function of wavelength (W/m2 per mu m versus wavelength in mu m). Assume the tungsten filament operates at a 3100 K temperature. Show an example calculation and hand in the plot (use Excel - no hand drawn plots) with clearly labeled axis and units. Calculate the wavelength where the irradiance maximizes - is your eye sensitive to this wavelength of light? Compare the area under your curve to the theoretical value. What fraction of the total energy is emitted as heat? (IR wavelengths where lambda > 0.8 um). What is the surface area (in units of cm2) of the tungsten filament?

Explanation / Answer

1.25cm2

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