What is zero degrees Kelvin?

Answer

Zero Kelvin is the lowest temperature that can be reached in the Universe. It is the temperature at which all motion stops at the atomic level. Zero Kelvin is also known as 'absolute zero'.

When water freezes and becomes ice the temperature is 0 degrees Celsius, which is equivalent to +273.15 Kelvin. The absolute coldest possible temperature is 0 Kelvin, which is equivalent to -273.15 degrees Celsius.

Scientists have cooled objects to within a few millionths of a degree of zero Kelvin.

The Kelvin scale is named for British mathematician and physicist William Thompson, 1st Baron Kelvin (1824-1907), who contributed much to unify the discipline of physics in its modern form.

Update: Actually, in 2000, scientists from the Helsinki Universtity of technology claim to have achieved levels as low as 100 pico kelvin or Ten thousand billionths of a degree (1×10⁻¹⁰K) and also, Zero Kelvin is not the lowest temperature that can be 'reached' simply because it is impossible to reach.

- Equilibria

Just to add:

We measure how hot something is by how much the particles in it are vibrating. But what if we went to the point when the particles are not vibrating at all? That temperature is zero dergees Kelvin (absolute zero)

First answer by Rshelby. Last edit by Okm. Contributor trust: 0 [recommend contributor]. Question popularity: 79 [recommend question]