State; (a) the difference between plane polarized light and ordinary light; (b) two uses of polaroids.
Question 1 Report
State;
(a) the difference between plane polarized light and ordinary light;
(b) two uses of polaroids.
Answer Details
(a) Difference between plane polarized light and ordinary light: in plane (linearly) polarized light the vibrations of the electric field take place in only one plane perpendicular to the direction of travel, whereas in ordinary (unpolarized) light the vibrations occur in all planes perpendicular to the direction of travel.
(b) Two uses of polaroids:
- In sunglasses and camera filters to cut down glare from reflected light.
- In liquid-crystal displays (LCDs); also in polarimeters to measure sugar concentration, in stress analysis of materials, and in 3-D glasses.
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