Deduce the lens maker's formula.

Derive lens maker formula 1/f=(mu_(2)-mu_(1)/mu_1)(1/R_(1) - 1/R_(2))

What is the drawback of Newton's formula? Apply Laplace's correction and deduce the modified formula.

Deduce the relation overset (rarr)J = sigma overset (rarr)E from first principles considering Ohm's law to be true.

Deduce the dimension of conductance.

What are beats ? Deduce the expression for beat frequency.