Describe how polarized light can be produced by reflection.

Set up

• Unpolarized light is made incident on a transparent medium at an angle θ.
• The reflected light is viewed through a sheet of polaroid while turning the sheet about an axis perpendicular to its plane
• The procedure is repeated for various angles of incidence until the reflected ray is cut off from object.
• At this particular angle θ, the reflected light is completely polarized.

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