SATHEE: Optics Question 560

Optics Question 560

Question: $V_{o}$ and $V_{E}$ represent the velocities, $μ_{o}$ and $μ_{E}$ the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

[KCET 2002]

Options:

A) $V_{o} \geq V_{E}, μ_{o} \leq μ_{E}$ if the crystal is calcite

B) $V_{o} \leq V_{E}, μ_{o} \leq μ_{E}$ if the crystal is quartz

C) $V_{o} \leq V_{E}, μ_{o} \geq μ_{E}$ if the crystal is calcite

D) $V_{o} \geq V_{E}, μ_{o} \geq μ_{E}$ if the crystal is quartz

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Answer:

Correct Answer: C

Solution:

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 me < m0

Therefore ve > v0 For quartz me > m0

Therefore v0 > ve

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Optics Question 560

Question: Vo and VE represent the velocities, μo and μE the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

Options:

Answer:

Solution:

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Question: $V_{o}$ and $V_{E}$ represent the velocities, $μ_{o}$ and $μ_{E}$ the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then