WorksheetsPolarisation of Light
Total questions: 29
Worksheet time: 15mins
Which waves can be polarised?
Transverse waves
Longitudinal waves
Both transverse and longitudinal waves
Neither transverse and longitudinal waves
What happen if ordinary unpolarized light passed through a uniaxial crystal?
Light remains unaffected.
The light is split into two rays.
The light is split into more than two rays.
None of these
What happen if o-ray and e-ray travel along the optic axis?
Both rays travel with the same speed.
o-ray travel 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 extraordinary rays ?
2π
π
4π
0
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
The acute angle of principle section of calcite crystal is
710
680
1090
1020
Canada Balsam acts as ...... medium for o-ray
Rarer
Denser
Which phenomenon is used in Nicol prism to eliminate o-ray.
Total internal reflection
Double Refraction
Refraction
Polarisation
In negative uniaxial crystal the sphere lies inside the ellipsoid.
True
False
In positive uniaxial crystal o-ray travels faster than e-ray.
True
False
2. What should be the phase difference between the two plane-polarized waves, vibrating at right angles to each other, to produce circularly polarized light?
a) π/6
b) π/2
c) π/4
d) π/3
3. Sound waves can be polarized.
True
False
Which of the following is a uniaxial crystal?
a) Borax
b) Mica
c) Quartz
d) Selenite
If the phase difference between two rays is π/2 and the angle of incidence is not equal to π/4, the emergent light is __________
a) Linearly Polarized
b) Elliptically Polarized
c) Circularly Polarized
d) Non-Polarized
Uniaxial crystals are those in which there is -------------. Calcite, quartz, ice are a few examples.
Borax, mica, and selenite are biaxial crystals which have ----------------------
(a)
Properties of waves are
I. polarization
II. diffraction
III. refraction
Which of these properties apply to sound waves?
I and II
II and III
I and III
All of them
What is meant by crossed polaroids?
The axis of transmission of both polaroids are parallel
The axis of transmission of both polaroids are perpendicular
Huygens' concept of secondary waves
allows us to find the focal length of a
thick lens.
gives us the magnifying power of a
microscope.
is a geometrical method to find a
wavefront.
is used to determine the velocity of light.
The transverse nature of light is shown by
interference of light.
refraction of light.
polarisation of light.
dispersion of light.
Unpolarised light consists of electric field vectors in
any one plane
plane of paper
perpendicular to plane of paper
all possible planes
When unpolarised light is incident on a plane glass at Brewster's angle, then which of the following statements is correct?
Reflected and refracted rays are completely polarised with their planes of polarisation parallel to each other.
Reflected and refracted rays completely polarised with their planes of polarisation perpendicular to each other.
Reflected light is plane polarised but transmitted light is partially polarised.
Reflected light is partially polarised but refracted light is plane polarised.
Refractive index of material is equal to tangent of polarising angle. It is called
Lambert's law
Bragg's law
Brewster's law
Malus law
A ray of light incident on a glass slab gets completely polarised. If the angle of incidence is Θ, then the angle of refraction is
Θ
90° - Θ
180° - Θ
90° + Θ
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
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 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
For E-ray, the Canada balsam layer is optically rarer.
True
False
A plate which induces the desired amount of phase difference between two rays is known as
Polaroid
Phasor plates
Retardation Plates
Quartz plates
