Explain Damped oscillation and forced oscillation with its derivation

The four giant gas points that are made primarily of lightweight elements are

State the right hand rule of the direction of magnetic field in a conductor carrying current

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?