Power of a power

Emissive power of any surface (e), Absorptive power (a), Reflecting power (r) and transmission power (t) are related as –

Define absorptive power and emissive power of a body.

Distinguish betwen magnifying power and resolving power of a telescope.

Define magnifying power and resolving power of a telescope.

Define magnifying power and resolving power of a telescope.

Emissive power and Absorptive power of a body depend upon

Power factor is defined as the ratio of true power to apparent power:-Calculate average power it.The A.C circuit is purely inductive.