Radiation/.

By now, it's like STANDARD QUESTION already. HAHA.
WHAT IS RADIATION?????

Radiation is:
- the continual emmision of infrared waves from the surface of all bodies, transmitted without the aid of a medium
(Radiation does not require a medium for energy transfer!)
*WHICH MEANS THAT RADIATION CAN EVEN TAKE PLACE IN A VACUUM*

Things to know:
1) Thermal energy from infrared waves is known as radiant heat.
2) All objects emmit radiant heat! (It's just a matter of how strong the heat is)
[The hotter the object, the greater the amount of rediant heat emmited!]

ALSO, it's interesting to know that the Sun is a major source of radiant heat!

But QUESTION: (Practice time! :D)
Why does thermal energy from the Sun reach the Earth by ONLY radiation?

MY ANWSER TO IT:
It is not possible for thermal energy from the Sun to reach the Earth through conduction or convection becasue of the vacuum existing between the Sun and the Earth. However, thermal energy from the Sun can reach the Earth through radiation as radiation does not require the thermal energy to pass through with the aid of a medium, which means that it can even take place in a vacuum.

:D

Haha Mr Lim, am I right?

:DDD