Temperature conversion:

273 + degree Celsius = Kelvin

Actually why is that 273? How does one come up with this?

My teacher mentioned Gann's law (not sure if this is the one) but I couldn't find anything related to this, which law should it be?

Temperature conversion:

$$273 + \text{degree Celsius} = \text{Kelvin}$$

Actually why is that $273$? How does one come up with this?

My teacher mentioned Gann's law (not sure if this is the one) but I couldn't find anything related to this, which law should it be?

Temperature conversion:

273 + degree Celsius = Kelvin

Actually why is that 273? How does one come up with this?

My teacher mentioned gann's law(not sure if this is the one) but i couldn't find anything related to this, which law should it be?
Thanks in advance.

Temperature conversion:

273 + degree Celsius = Kelvin

Actually why is that 273? How does one come up with this?

My teacher mentioned Gann's law  (not sure if this is the one) but I couldn't find anything related to this, which law should it be?