a. State what is meant by plane polarised light.
b. Reflected light from the surface of water is partially plane polarised.
Describe briefly how you could demonstrate this.
c. Vertically plane polarised light is incident on three polarising filters. The transmission axis of the first Polaroid is vertical. The transmission axis of the second filter is 45° to the vertical and the transmission axis of the last filter is horizontal.
Show that the intensity of light emerging from the final filter is not zero.