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Question

The heat from the Sun reaches the Earth's surface predominantly by which of the following modes of heat transfer?

A
Convection
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B
Radiation
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C
Conduction
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D
Diffusion
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Solution

The correct option is B Radiation
Radiation is the mode of heat transfer which does not require any medium. Since there is an absence of a medium between Earth and the Sun, except for a small layer of the atmosphere, heat transfer occurs through radiation.

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