LEARNATHON
III

Competition for grade 6 to 10 students! Learn, solve tests and earn prizes!

### Theory:

Radiation is a form of heat transfer in which particles are not required to carry heat energy. Heat is transferred in the form of waves from hot objects in all directions. Radiation can occur in a vacuum, but conduction and convection require the presence of matter. Electromagnetic waves travelling at the speed of light constitute radiation.

The heat energy of the sun is transferred to us in the form of radiation. All bodies above $$0$$ degrees Celsius emit radiation. Radiation is absorbed by some objects, while others reflect it.