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Explain how you could use a single polarizing filter to detirmine whether light from a given...

Explain how you could use a single polarizing filter to detirmine whether light from a given source is polarized or unpolarized: what would you do with the filter? What would you see if the light was polarized vs unpolarized?

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Answer #1

When an unpolarized light with intensity Io passes through a polarizer ,it polarizes the light and and intensity of light becomes Io/2 after transmitting the polarizer.

When a polarized light with intensity Io passes through a polarizer its intensity after transmitting is given by relation

I = Io (cos)^2

where is the angle between polarization axis of polarizer and the line along which light is polarized.

By measuring the transmitted intensity we differentiate whether light was unpolarized or polarized.

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