Physics ยท Science General

Optics and Light Properties

2,019 Questions

Optics and light properties focus on the behavior of light, including reflection, refraction, dispersion, and polarization. This topic also covers the wave nature of light, illumination, and the functioning of optical instruments like microscopes. Questions on these concepts are common in general science sections of SSC, Railways, and State exams.

Reflection and mirrorsRefraction and mediumsLight wave theoriesPolarization and intensity

Optics and Light Properties Questions

Multiple choice

What is the phenomenon of the rotation of the plane of polarization of light as it passes through certain materials called?

  1. Optical activity

  2. Birefringence

  3. Dichroism

  4. Polarization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Optical activity is the phenomenon of the rotation of the plane of polarization of light as it passes through certain materials. This rotation is due to the chiral nature of the molecules in the material.

Multiple choice

What is the phenomenon of the splitting of a light beam into two beams with different polarizations called?

  1. Birefringence

  2. Dichroism

  3. Polarization

  4. Optical activity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birefringence is the phenomenon of the splitting of a light beam into two beams with different polarizations. This occurs when light passes through a material that has a different refractive index for different polarizations.

Multiple choice

What is the phenomenon of the selective absorption of light of certain polarizations called?

  1. Dichroism

  2. Birefringence

  3. Polarization

  4. Optical activity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dichroism is the phenomenon of the selective absorption of light of certain polarizations. This occurs when light passes through a material that has a different absorption coefficient for different polarizations.

Multiple choice

What is the phenomenon of the production of polarized light by the scattering of light by particles called?

  1. Rayleigh scattering

  2. Mie scattering

  3. Thomson scattering

  4. Compton scattering
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rayleigh scattering is the phenomenon of the production of polarized light by the scattering of light by particles that are much smaller than the wavelength of light.

Multiple choice

What is the phenomenon of the production of polarized light by the emission of light by atoms or molecules called?

  1. Fluorescence

  2. Phosphorescence

  3. Luminescence

  4. Incandescence
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fluorescence is the phenomenon of the production of polarized light by the emission of light by atoms or molecules that have been excited by the absorption of light.

Multiple choice

What is the phenomenon of the production of polarized light by the reflection of light from a metal surface called?

  1. Brewster's angle reflection

  2. Total internal reflection

  3. Metallic reflection

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Brewster's angle reflection is the phenomenon of the production of polarized light by the reflection of light from a metal surface at the Brewster's angle.

Multiple choice

What is the phenomenon of the production of polarized light by the transmission of light through a polarizing filter called?

  1. Polarization by absorption

  2. Polarization by reflection

  3. Polarization by scattering

  4. Polarization by emission
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polarization by absorption is the phenomenon of the production of polarized light by the transmission of light through a polarizing filter. The polarizing filter selectively absorbs light of one polarization, while transmitting light of the other polarization.

Multiple choice

What is the phenomenon of the production of polarized light by the diffraction of light called?

  1. Fresnel diffraction

  2. Fraunhofer diffraction

  3. Babinet's principle

  4. Huygens-Fresnel principle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fraunhofer diffraction is the phenomenon of the production of polarized light by the diffraction of light from a narrow slit or aperture.

Multiple choice

What is the phenomenon of the production of polarized light by the interference of light called?

  1. Young's double-slit experiment

  2. Michelson interferometer

  3. Fabry-Perot interferometer

  4. Mach-Zehnder interferometer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Young's double-slit experiment is the phenomenon of the production of polarized light by the interference of light from two narrow slits or apertures.

Multiple choice

What is the phenomenon of the production of polarized light by the magneto-optic effect called?

  1. Faraday effect

  2. Kerr effect

  3. Cotton-Mouton effect

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Faraday effect, Kerr effect, and Cotton-Mouton effect are all phenomena of the production of polarized light by the magneto-optic effect. These effects occur when light passes through a material that is subjected to a magnetic field.

Multiple choice

What is the basic principle of Atomic Absorption Spectroscopy?

  1. Atoms in a sample absorb light of specific wavelengths.

  2. Atoms in a sample emit light of specific wavelengths.

  3. Atoms in a sample scatter light of specific wavelengths.

  4. Atoms in a sample reflect light of specific wavelengths.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Atomic Absorption Spectroscopy, a sample is atomized, and the atoms are then exposed to a beam of light. The atoms absorb light of specific wavelengths that are characteristic of the element, and the amount of absorption is proportional to the concentration of the element in the sample.

Multiple choice

What is the role of the monochromator in Atomic Absorption Spectroscopy?

  1. To select the wavelength of light that is used to excite the atoms.

  2. To select the wavelength of light that is absorbed by the atoms.

  3. To focus the light beam on the sample.

  4. To remove impurities from the light beam.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The monochromator in Atomic Absorption Spectroscopy is used to select the wavelength of light that is absorbed by the atoms. This is done by passing the light beam through a series of slits or filters that only allow light of a specific wavelength to pass through.

Multiple choice

Which of the following is NOT a property of optical materials?

  1. Refractive index

  2. Absorption coefficient

  3. Thermal conductivity

  4. Dispersion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thermal conductivity is not an optical property, it is a measure of a material's ability to conduct heat.

Multiple choice

The refractive index of a material is defined as the ratio of:

  1. Speed of light in vacuum to the speed of light in the material

  2. Speed of light in the material to the speed of light in vacuum

  3. Frequency of light in vacuum to the frequency of light in the material

  4. Wavelength of light in vacuum to the wavelength of light in the material
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The refractive index is defined as the ratio of the speed of light in vacuum to the speed of light in the material.

Multiple choice

Which of the following materials has the highest refractive index?

  1. Glass

  2. Diamond

  3. Water

  4. Air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diamond has the highest refractive index among the given options, with a value of approximately 2.42.