Question

If ${\mu }_O$ and ${\mu }_e$ are the refractive indices of a double
refracting crystal, then
1) ${\mu }_O$ < ${\mu }_e$ for quartz crystal
2) ,${\mu }_O$ > ${\mu }_e$ for calacite crystal

• A. both 1 and 2 are true
• B. 1 is true 2 is false
• C. 1 false 2 is true
• D. both 1 and 2 are false

Answer 1

The correct option is A both 1 and 2 are true

For quartz crystal ${\mu }_0=1.544;{\mu }_e=1.553$
For calacite crystal ${\mu }_0=1.658;{\mu }_e=1.486$
Thus both a and b are true.