A man feels hot when he comes close to fire. Heat is transferred through?

Explanation

When a person stands near a fire, they feel hot primarily through radiation and convection. 

Radiation

• This is the transfer of heat through electromagnetic waves, primarily infrared radiation, and does not require a medium (like air or water) to travel.
• Fire radiates energy in all directions, which is why you can feel the warmth even if the air around you is cold.
• When the radiant energy from the fire hits your skin, it is absorbed and converted into thermal energy, making you feel warm. 

Convection

• This is the transfer of heat through the movement of a heated fluid (in this case, air).
• The air directly above the fire gets hot, becomes less dense, and rises.
• This creates air currents that carry heat upward and can warm a person standing nearby.
• However, when standing to the side of a fire, the effect of convection is usually much less than radiation, as the hottest air rises and billows away from you. 

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