Question
Physics Question on Polarisation
H - polaroid is prepared by _____
A
stretching polyvinyl alcohol and then heated with dehydrating agent
B
stretching polyvinyl alcohol and then impregnating with iodine
C
orienting herapathite crystal in the same direction in nitrocellulose
D
by using thin tourmaline crystals
Answer
stretching polyvinyl alcohol and then impregnating with iodine
Explanation
Solution
Answer (b) stretching polyvinyl alcohol and then impregnating with iodine