Incandescence

Incandescence is the emission of electromagnetic radiation (including visible light) from a hot body as a result of its temperature. The term derives from the Latin verb incandescere, to glow white.

Incandescence is a special case of thermal radiation. Incandescence usually refers specifically to visible light, while thermal radiation refers also to infrared or any other electromagnetic radiation.

For a detailed discussion of the intensity and spectrum (color) of incandescence, see the article: thermal radiation.

Observation and use

In practice, virtually all solid or liquid substances start to glow around 798 K (525 °C) (977 ˚F), with a mildly dull red color, when no chemical reactions take place that produce light as a result of an exothermic process. This limit is called the Draper point. The incandescence does not vanish below that temperature, but it is too weak in the visible spectrum to be perceivable.

At higher temperatures, the substance becomes brighter and its color changes from red towards white and finally blue.

The Underachievers

{{Infobox musical artist | name = The Underachievers | image = TheUnderachievers2013.jpg | caption = Issa Gold and AK performing live in August 2013. | image_size = 320px | background = group_or_band | alias = | origin = Flatbush, Brooklyn, New York City, New York, United States | genre = Hip hop, psychedelic hip hop | years_active = 2011–present | label = RPM MSC, Brainfeeder | associated_acts = Pro Era, Flatbush Zombies, ASAP Mob, Flying Lotus, Denzel Curry, Dyme-A-Duzin | website = www.theualifestyle.com | current_members = AK
Issa Gold

The Underachievers are an American hip hop group from Flatbush, Brooklyn, New York, formed in 2011. The group is composed of East Coast rappers AK, and Issa Gold. American record producer Flying Lotus signed the duo to his Brainfeeder record label in 2012. Following their signing they released two critically acclaimed mixtapes, Indigoism and Lords of Flatbush in 2013. Their debut studio album Cellar Door: Terminus Ut Exordium was released on August 12, 2014. The Underachievers released their 2nd official album Evermore: The Art of Duality on September 25, 2015.