Question

conduction does not occur in vaccum give reason​

Answer 1

Definition of conduction says that it is a mode of heat transfer in which molecular vibrations and free electrons participate to transfer heat. So there has to be a medium for conduction to take place. Vacuum means nothing. Hence, there cannot be heat transfer through conduction in vacuum. Instead, the heat transfer is possible through radiation only in the case of transfer of heat through vacuum.

Answer 2

Answer:

Since vacuum is an empty space devoid of any material or particles no transfer of energy can take place