Use a computer to calculate Planck’s radiation law for a temperature of 3000 K, which is the temperature of a typical tungsten fi lament in an incandescent lightbulb. Plot the intensity versus wavelength. (a) How much of the power is in the visible region (400–700 nm) compared with the ultraviolet and infrared? (b) What is the ratio of the intensity at 400 nm and 700 nm to the wavelength with maximum intensity?
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