Double refraction

Uniaxial crystals are those in which there is -------------. Calcite, quartz, ice are a few examples.

Borax, mica, and selenite are biaxial crystals which have ----------------------

For E-ray, the Canada balsam layer is optically rarer.

• True

• False

A tube of length 20cm containing a 10% sugar solution rotates the plane of polarization by 13.2°. What is the specific rotation of sugar solution?

• 66°

• 55°

• 44°

• 33°

Polarimeter is a device used for

• measurement of optical rotation

• measurement of angle of polarisation

• measurement of angle of reflection

• measurement of angle of refraction

When two waves of same amplitude add constructively, the intensity becomes _____________

• Double

• Half

• Four Times

• One-Fourth

If the phase difference between two rays is π/2 and the angle of incidence is equal to π/4, the emergent light is

• Linearly Polarized

• Elliptically Polarized

• Circularly Polarized

• Non-Polarized

Wavelength of spectral lines can be calculated from λ = ______.

• Sin θ/Nm

• Nm/Sin θ

• N Sin θ/m

• m Sin θ/N

The plane in which electric field vector of plane polarised light vibrates is known as

• Plane of vibration

• Plane of polarisation

• Principle plane

• none of these

Doubly refracting calcite crystal is placed over an ink dot. On seeing through the crystal, one observes.

• both dots rotating about a comman axis

• two stationary dots

• one dot rotating about the other

• a single dot

Which of the phenomena suggests that light may be a transverse wave?

• Interference

• Diffraction

• Reflection

• Polarization