Scattered light in the atmosphere is often partially polarised.The best way to determine whether or not light from a particular direction in the sky shows polarisation is to:
A)diffract the light through a single slit.
B)squint while looking in that direction.
C)rotate a piece of polaroid film about an axis parallel to the ray while looking through it in that sky direction.
D)rotate a piece of polaroid film about an axis perpendicular to the ray while looking through it in that sky direction.
E)reflect the rays from that direction on a shiny metal surface.

Question

Quizplus · Accepted Answer

The most effective way to determine if light from a particular direction in the sky shows polarisation is to use a piece of polaroid film. By rotating the film about an axis parallel to the light ray while looking through it in that direction, any polarisation in the scattered light will become visible as changes in brightness or contrast. This is because polaroid film is designed to block light waves that are oscillating in certain directions, allowing only waves that are polarised in a specific orientation to pass through. Therefore, rotating the polaroid film will reveal any polarisation present in the scattered light.

Scattered Light in the Atmosphere Is Often Partially Polarised