When we hold our hands close to the side of a flame, they get warmed up mainly due to -
(a)Conduction as well as Convection
(b)Conduction
(c)Radiation
(d)Convection

Pls. explain

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Solution

Option (c) is the right answer.
Almost 100% thermal radiation. The air acts as a a thermal insulator, so no conduction there, convection involves heated fluid and mostly pushed upward. Radiative heat from campfire in infrared and visible wavelengths spreads out in different directions and is not affected by air, thus, reaching your hands.

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When we hold our hands close to the side of a flame, they get warmed up mainly due to - (a)Conduction as well as Convection (b)Conduction (c)Radiation (d)Convection Pls. explain

When we hold our hands close to the side of a flame, they get warmed up mainly due to -
(a)Conduction as well as Convection
(b)Conduction
(c)Radiation
(d)Convection

Pls. explain