4 ideal linear polarisers are placed in a row with the polarising axis vertical 20° to vertical 55°to vertical and 90°.natural light of intensity I0 incident on the first polarizer. calculate the intensity of light emerging from the last polariser.

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units