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  •  and <img alt="\mathrm{V_E}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmath

\mathrm{V_o } and \mathrm{V_E} represent the velocities, \mathrm{ \mu_o} and \mathrm{ \mu_E} the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

Option: 1

\mathrm{V_0 \geq V_E, \mu_0 \leq \mu_E \text { if the crystal is calcite }}


Option: 2

\mathrm{V_0 \leq V_E, \mu_o \leq \mu_E \text { if the crystal is quartz }}


Option: 3

\mathrm{V_o \leq V_E, \mu_0 \geq \mu_E \text { if the crystal is calcite }}


Option: 4

\mathrm{V_o \geq V_E, \mu_o \geq \mu_E \text { if the crystal is quartz }}


Answers (1)

best_answer

In double refraction light rays always splits into two rays (O-ray & E-ray). O-ray has same velocity in all direction but E-ray has different velocity in different direction.

For calcite \mathrm{\mu_e<\mu_0 \Rightarrow v_e>v_0}

For quartz \mathrm{\mu_e>\mu_0 \Rightarrow v_0>v_e}

Posted by

seema garhwal

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