Question

Assertion (A): We cannot receive heat from the sun through convection. Reason (R): The sun is too far away from Earth, and the heat from the sun dissipates mid-way.

A) Both assertion and reason are true, and reason is the correct explanation of the assertion.
B) Both the assertion and reason are true, and reason is not the correct explanation of the assertion.
C) Assertion is true, but reason is false.
D) Assertion is false, but reason is true.

Answer 1

We cannot receive heat from the sun through convection because convection requires a medium for transfer, and space is largely empty. Heat from the Sun is transferred by radiation, which doesn't need a medium. Therefore, the assertion is true, but the reason stated is false.

Step-by-step explanation:

The assertion that we cannot receive heat from the sun through convection is true. Convection is a type of heat transfer that requires a medium, such as a liquid or a gas, where warmer, less dense material rises and cooler, denser material sinks. Since the space between Earth and the Sun is largely empty and lacks such a medium, heat transfer from the Sun to Earth cannot occur through convection. Therefore, the Earth receives heat from the Sun through radiation, which is the transfer of energy by electromagnetic waves that do not require a medium to travel through. The reason given, that 'the sun is too far away from Earth, and the heat from the sun dissipates mid-way', is not accurate because the heat does not dissipate; it is effectively transmitted across the vast emptiness of space by electromagnetic radiation.

Based on this, the answer is: (C) Assertion is true, but reason is false.