# Henri Victor Regnault’s Archive

## Do You Know- Reaching Absolute Zero Temperature is as difficult as attaining Speed of Light

What is the lowest temperature that you have experienced? Our body temperature is 37 degree Celsius. Room temperature is lower than that which is 25 degree Celsius. Fridges are generally at four degree Celsius and ice forms at zero degree Celsius. Can temperature go below zero degree Celsius? Yes. Temperatures below zero degree Celsius are generally measured in Kelvin scale, where 273 K is equal to zero degree Celsius. Temperature of liquid nitrogen is approximately 70 Kelvin and liquid helium is approximately 4 kelvin. As we decrease the temperature, there are many curious phenomena that happen which have significant effects