Question

What is radiation? How is it different from convection and conduction?

List two objects that absorb radiant energy from the Sun.

List two objects here on Earth that are sources of radiant energy. How can you tell that they emit radiant energy?

Answer 1

Answer:

A) radiation is a process of heat transfer from a hot body to a cold body without any need of the medium

Convection =1) it is a process of heat transfer by actual movement of particles of the medium

2)it is not possible in vacuum 3)it is faster

Conduction= 1)it is a process of heat transfer from the end at high temperature to the end at low temperature from particle to particle. 2)it is also not possible in vacuum. 3)it is slower

Answer 2

Answer:

Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

Difference Between Conduction, Convection and Radiation. While conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves.

Two objects that absorb radiant energy from the Sun are :-

• Our bodies.
• The Benches at a Baseball Field.

Two objects here on Earth that are sources of radiant energy :-

• Candle flames.
• incandescent light bulbs.

You can tell that they emit radiant energy because they glow and feel hot.

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