Physics
In a optical fibre cable, the signal is propagated along the

Inner Core
Surface and cladding
Cladding
Both core and cladding

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Physics
Which of the following options correctly explains the term heat budget?

It is the balance between incoming and outgoing radiation
It is a mode of transfer of heat through matter by molecular activity.
It is the amount of heat which the surface of earth receives from the sun.
It is the radiation from the earth in the form of long waves.

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