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mcq on Polarization of Light. We covered all the mcq on Polarization of Light in this post for free so that you can practice well for the exam.
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mcq on Polarization of Light for NEET Students
In a single-slit Diffraction setup, which of the following is directly proportional to the wavelength of Light?
(a) Width of the central bright fringe
(b) Angular span of the central maximum
(c) Both the above options
(d) Width of the slit
Option c – Both the above options
At a particular moment, how can unpolarized Light be described?
(a) As the sum of two perpendicularly polarized waves
(b) Having a fixed direction of vibration
(c) Confined to the vertical plane
(d) Confined to just one plane
Option a – As the sum of two perpendicularly polarized waves
A plane mirror is hit by Light at a 40° angle. If the mirror is turned by 15°, what is the new deviation angle?
(a) 15°
(b) 30°
(c) 45°
(d) 70°
Option d – 70°
A concave mirror has a focal length of 40 cm. If the image size is four times the object size, the two object positions could be:
(a) u = –20 cm and u = –10 cm
(b) u = –50 cm and u = –10 cm
(c) u = –20 cm and u = –30 cm
(d) u = –50 cm and u = –30 cm
Option d – u = –50 cm and u = –30 cm
The vibrations in an unpolarized transverse wave are
(a) Confined to a single plane
(b) In random directions
(c) Unaffected by polarization filters
(d) Perpendicular to the direction of propagation in all directions
Option d – Perpendicular to the direction of propagation in all directions
If an object and an observer are in two different media, which condition cannot exist?
(a) Real depth is greater than apparent depth
(b) Real depth is less than apparent depth
(c) Real and apparent depths are equal
(d) All of these are possible
Option d – All of these are possible
In Fraunhofer Diffraction, the central fringe is always
(a) Dark
(b) Bright
(c) Dark for low frequencies, bright for high
(d) Bright for long wavelengths only
Option b – Bright
When red and green lights pass through the same Diffraction setup:
(a) The combined pattern is white
(b) Patterns are same but differ in color
(c) Red Light forms a broader Diffraction pattern
(d) Green Light forms a broader Diffraction pattern
Option c – Red Light forms a broader Diffraction pattern
Single slit Diffraction results from interference of
(a) Spherical wavefronts from a point source
(b) Cylindrical wavefronts from a point source
(c) Secondary wavelets from slit passing wavefronts
(d) Refracted wavefronts through the slit
Option c – Secondary wavelets from slit passing wavefronts
If the first minimum occurs at 30° using a slit of width 0.08 μm, what is the Light’s wavelength?
(a) 400 Å
(b) 500 Å
(c) 600 Å
(d) 700 Å
Option a – 400 Å
A light ray enters glass at Brewster’s angle and bends by 22°. What is the angle of polarization?
(a) 56°
(b) 53°25′
(c) 34°
(d) 51°
Option a – 56°
Plane-polarized light hits a tourmaline crystal normally, and intensity drops by 75%. What is the angle between the electric Vector and optical axis?
(a) 60°
(b) 45°
(c) 30°
(d) 15°
Option a – 60°
The reciprocal of the minimum angle to resolve two close objects in an optical instrument represents:
(a) Convex lens resolving power
(b) Telescope’s magnification
(c) Telescope’s resolving power
(d) Convex lens magnification
Option c – Telescope’s resolving power
Brewster’s law relates to
(a) Scattering-based polarization
(b) Reflection-based polarization
(c) Refraction-based polarization
(d) Selective absorption
Option b – Reflection-based polarization
For fixed wavelength, the resolving ability of a telescope increases with:
(a) Eyepiece focal length
(b) Objective lens focal length
(c) Total telescope length
(d) Diameter of objective lens
Option d – Diameter of objective lens
Assertion: Ultrasonic waves are capable of polarization.
Reason: These waves are mechanical in nature.
(a) Both are true; reason explains assertion
(b) Both are true; reason doesn’t explain assertion
(c) Assertion true, reason false
(d) Assertion false, reason true
Option d – Assertion false, reason true
Assertion: Diffused reflection is random.
Reason: It occurs from uneven or rough surfaces.
(a) Both are true; reason explains assertion
(b) Both are true; reason doesn’t explain assertion
(c) Assertion true, reason false
(d) Assertion false, reason true
Option a – Both are true; reason explains assertion
In double refraction, which rays are polarized?
(a) Only ordinary ray
(b) Only extraordinary ray
(c) Both ordinary and extraordinary rays
(d) Neither
Option c – Both ordinary and extraordinary rays
Plane polarized light can be generated through
(a) Selective absorption
(b) Reflection
(c) Birefringence
(d) All the above
Option d – All the above
Light reflected from glass is linearly polarized. If its refraction angle in glass is 30°, what’s the glass’s refractive index?
(a) 1.14
(b) 1.41
(c) 1.57
(d) 1.73
Option d – 1.73
Replacing a single slit with a circular aperture changes the Diffraction pattern to:
(a) No Diffraction seen
(b) No change at all
(c) A circular central spot with rings
(d) Just a central bright fringe
Option c – A circular central spot with rings
Which light color gives a microscope its best resolving power?
(a) Red
(b) Yellow
(c) Green
(d) Blue
Option d – Blue
For a slit width that causes the first Diffraction minimum at 1.8° with 700 nm light, what is the width?
(a) 2 mm
(b) 0.2 mm
(c) 0.02 mm
(d) 0.002 mm
Option c – 0.02 mm
Assertion: Polaroids help differentiate between unpolarized and polarized light.
Reason: Unpolarized light can’t pass through a polaroid.
(a) Both are true; reason explains assertion
(b) Both are true; reason doesn’t explain assertion
(c) Assertion true, reason false
(d) Assertion false, reason true
Option c – Assertion true, reason false
Diffraction occurs for
(a) Only light waves
(b) Only polarized waves
(c) Only waves from coherent sources
(d) None of these
Option d – None of these
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