WAEC Physics 2011 Theory — Question 7
Question 7 of 39 from the West African Examinations Council (WAEC) Physics 2011 Theory paper, with the correct answer and a full explanation.
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3(b) State two uses of polaroids.
Model answer
Uses of polaroid: (i) In sunglasses, to reduce the amount of light intensity entering the eye by reducing glare from wet surfaces (blocking some reflected light). (ii) In stress analysis or photo-elasticity. (iii) In the measurement of concentration of sugar solution (saccharimetry) (any two).
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