Question

If for a calcite crystal, ${\mu }_0$ and ${\mu }_e$ are the refractive indices of the crystal for O-ray and E-ray repectively, then along the optic axis of the crystal

• A. ${\mu }_0$ = ${\mu }_e$
• B. ${\mu }_0$ > ${\mu }_e$
• C. ${\mu }_0$ < ${\mu }_e$
• D. None of these

Answer 1

Answer: (A)

${\mu }_0$ = ${\mu }_e$

In calcite crystal, only along the optical axis, the refractive indices of the crystal are equal for O-ray and E-ray