Wien's displacement law is a law of physics that states that there is an inverse relationship between the wavelength of the peak of the emission of a black body and its temperature. Physics (from the Greek, φυσικός (physikos), natural, and φύσις (physis), Nature) is the science of Nature in the broadest sense. ... The wavelength is the distance between repeating units of a wave pattern. ... As the temperature decreases, the peak of the black body radiation curve moves to lower intensities and longer wavelengths. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ...

where T is the temperature of the blackbody in kelvins (K) and λ_max is the peak wavelength in meters. The 0.002898 is a proportionality constant with units meter-kelvins (m·K). It is sometimes expressed in cgs units as 0.29 cm·K. The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... This article is about proportionality, the mathematical relation. ... CGS is an acronym for centimetre-gram-second. ...

Basically, the hotter an object is, the shorter the wavelength at which it will emit radiation. For example, the surface temperature of the sun is 5780 K, giving a peak at 500 nm. As can be seen in the article Color, this is fairly in the middle of the visual spectrum, due to the spread resulting in white light. Due to the Rayleigh scattering of blue light by the atmosphere this white light is separated somewhat, resulting in a blue sky and a yellow sun. The Sun (occasionally referred to as Sol) is the star at the centre of our solar system. ... For alternative meanings, see color (disambiguation). ... Alternate meanings: White (disambiguation) White is a color (more accurately it contains all the colors of the spectrum and is sometimes described as an achromatic color—black is the absence of color) that has high brightness but zero hue. ... Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye, or in a more general sense, any electromagnetic radiation in the range from infrared to ultraviolet. ... Rayleigh scattering (named after Lord Rayleigh) is the scattering of light by particles smaller than the wavelength of the light. ...

A lightbulb has a glowing wire with a somewhat lower temperature, resulting in yellow light, and something that is "red hot" is again a little less hot. The incandescent light bulb uses a glowing wire filament heated to white-hot by electrical resistance, to generate light (a process known as thermal radiation). ...

Although the law was first formulated by Wilhelm Wien, we now derive it from Planck's law of black body radiation. Wilhelm Wien Wilhelm Wien (January 13, 1864 - August 30, 1928) was a German physicist who, in 1893, used theories about heat and electromagnetism to compose Wiens Law, which relates the maximum emission of a blackbody to its temperature. ...