Polarization of Light
Physics ⇒ Light and Optics
Polarization of Light starts at 11 and continues till grade 12.
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See sample questions for grade 11
A polaroid is rotated through 360° in a beam of plane polarized light. The intensity of transmitted light will:
Describe one practical application of polarization in daily life.
Describe the difference between plane polarized, unpolarized, and partially polarized light.
Describe the polarization of light by scattering.
Explain how a polaroid filter works to polarize light.
A beam of unpolarized light of intensity I passes through three polaroids. The first polaroid has its axis vertical, the second is at 45° to the vertical, and the third is at 90° to the vertical. What is the final intensity of the transmitted light in terms of I?
A beam of unpolarized light of intensity I0 passes through two polaroids. The first polaroid is fixed, and the second is rotated. At what angle between their axes will the transmitted intensity be exactly one-fourth of I0?
A ray of light is incident on a surface at an angle of 60°. The refractive index of the medium is 1.73. Is the reflected light completely polarized? Justify your answer with calculations.
The phenomenon of double refraction is observed in which type of crystals?
(1) Isotropic
(2) Anisotropic
(3) Amorphous
(4) Metallic
The value of Brewster's angle for a glass-air interface (n = 1.5) is closest to:
(1) 30°
(2) 45°
(3) 57°
(4) 90°
When unpolarized light passes through two polaroids with their axes at 90° to each other, the intensity of transmitted light is:
(1) Maximum
(2) Half
(3) Zero
(4) One-fourth
Which of the following best describes the polarization of light by reflection?
(1) The reflected light is always unpolarized
(2) The reflected light is partially or completely polarized depending on the angle of incidence
(3) The reflected light is always completely polarized
(4) The reflected light is always absorbed
Brewster's angle is the angle of incidence at which the reflected light is completely _________.
Fill in the blank: The direction of polarization of light is defined by the direction of the ________ field vector.
If the angle between the transmission axes of two polaroids is θ, the intensity of transmitted light is proportional to _________.
The process of transforming unpolarized light into polarized light is called __________.
True or False: At Brewster's angle, the reflected and refracted rays are perpendicular to each other.
True or False: Only transverse waves can be polarized.
True or False: Polarization can be used to reduce glare in sunglasses.
True or False: The polarization of light can be used to determine the stress distribution in transparent plastics.
