WorksheetsDOUBLE REFRACTION AND OPTICAL ACTIVITY
Total questions: 15
Worksheet time: 8mins
In elliptically polarised light
amplitude of vibrations changes in magnitude and direction both
amplitude of vibrations changes only in magnitude
amplitude of vibrations changes only in direction
no change in amplitude
Optically active substances are these which
cause double refraction
rotate the plane of polarisation
polarise light
scatter light
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
In double refraction, two refracted rays are produced, called as O-ray and E-ray. Which of the following statements is TRUE
only O-ray is polarised
only E-ray is polarised
both O-ray and E-ray are polarised
neither E-ray nor O-ray are polarised
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
In the Nicol Prism experiment, the calcite crystal length is x times its breadth. What is x?
2
3
1/2
1/3
The working of Nicole prism is based on the phenomenon of .................
Refraction
Reflection
Diffraction
Double Refraction
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
What should be the thickness of quarter-wave plate for a light of wavelength 5000 Å if µe = 1.553 and µo = 1.544?
1.38 X 10-3 cm
1.43 X 10-3 cm
1.53 X 10-3 cm
1.63 X 10-3 cm
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°
A plate which induces the desired amount of phase difference between two rays is known as
Polaroid
Phasor plates
Retardation Plates
Quartz plates
What happen to O and E rays if they travel along the optic Axis?
Both ray travel with the same velocity
O ray travels faster than E ray
E ray travel faster than O ray
none of these
How much phase change is introduced by a quarter wave plate between ordinary and extra ordinary ray?
π
2π
4π
2π
Dextrorotatory optically active substance rotates the plane of vibration?
In clockwise direction
In anticlockwise direction
By 180 degree
none of these
