Question

Why is thermal energy from the sun transferred to Earth through electromagnetic waves, instead of any other type of thermal energy transfer?
A) Electromagnetic waves can carry energy through water

B) Electromagnetic waves can travel through empty space.

C) Electromagnetic waves can move through gases faster than other types of energy transfer.

D) Electromagnetic waves can move more energy than any other type of energy transfer.


THE CORRECT ANSWER IS B.

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Answer 1

Answer: B) Electromagnetic waves can travel through empty space.

Explanation:

Conduction: This type of heat transfer happens when there is direct contact between the two object.  Example: heating a pan on stove.

Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas) due to the movement of hot layers to the top and cold layers to the bottom which leads to convection currents. Example: Heating of swimming pool.

Radiation: This type of heat transfer happens when there is direct transfer of energy through empty space.The electromagnetic radiation from the surface of an object which is due to the object's temperature is radiation. Example: Heating of earth's surface.