In other words, the peak wavelength and the peak frequency do not correspond.
The effective result is to substitute 3 for 5 in the equation for the peak wavelength.
The thickness of the nanowire is also related to the peak wavelength.
If the body has a definite temperature, the higher it is the more total radiation is emitted, and the shorter the peak wavelength.
The Broad-band lamps give 290-320 nanometer, having a peak wavelength of 306 nanometer.
Narrow-band lamps give a 311-313 nanometer, having a peak wavelength of 312 nanometer.
Its emissivity, however, at a temperature of about -5 C, peak wavelength of about 12 micrometers, is 0.99.
The peak wavelength of light from the sun, for example, is green, which corresponds to a surface temperature of about 10,000 degrees Fahrenheit.
A sensor in the thermometer scans for the peak wavelength of infrared light, which tells the temperature of the ear drum area.
The peak wavelength is determined by the temperature, T based on Wien's displacement law: