Tag: wave optics

Quizzes (12) Questions (312)

Questions Related to wave optics

Multiple choice polarisation of light polarisation wave optics optics physics

Choose the correct statement ______

  1. Brewster's angle is independent of the wavelength of light.

  2. Brewster's angle is independent of nature of reflecting the surface.

  3. Brewster's angle is different for different wavelengths.

  4. Brewster's angle depends on the wavelength but not on the nature of reflecting the surface.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Brewester's angle depends on the wavelength of light because Brewester's angle depends on the refractive index of medium and refractive index depends on the wavelength of light. 

Multiple choice polarisation of light polarisation wave optics optics physics

For a given medium, the polarising angle is $  60^{\circ} .  $ What is the critical angle for this medium?

  1. $\tan^{-1}(\dfrac 1{\sqrt 3})$
  2. $\sin^{-1}(\dfrac 1{\sqrt 3})$
  3. $\tan^{-1}( {\sqrt 3})$
  4. $\sin^{-1}({\sqrt 3})$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Refractive index mu = tan(i_p) = tan(60) = sqrt(3). Critical angle theta_c = sin^-1(1/mu) = sin^-1(1/sqrt(3)).

Multiple choice polarisation of light polarisation wave optics optics physics

Which of the following properties shows that light is a transverse wave?

  1. Reflection

  2. Interference

  3. Diffraction

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

The polarization phenomenon, verifies the transverse nature of light. Since sound has longitudinal nature, so it does not show polarization effect.

Multiple choice polarisation of light polarisation wave optics optics physics

When the light is incident at the polarizing angle on transparent medium, then the completely polarized light is 

  1. refracted light

  2. reflected light

  3. refracted and reflected light

  4. neither reflected nor refracted light
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the light is incident at the polarising angle on the transparent medium, the reflected light is completely polarised.

Multiple choice polarisation of light polarisation wave optics optics physics

Which of the following cannot be polarised ?

  1. Radio waves
  2. $\beta$ rays

  3. Infrared rays
  4. $\gamma$ rays
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$ \beta $ are stream of particles comprising of electrons moving with very high velocity, hence it cannot be polarized, while others can as they are electromagnetic waves.

Multiple choice polarisation of light polarisation wave optics optics physics

The transverse nature of light is shown by

  1. interference of light

  2. refraction of light

  3. polarization of light

  4. dispersion of light
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Polarisation of light establishes that light are transverse in nature, otherwise it was believed that they are longitudinal waves, like the sound waves.

Multiple choice polarisation of light polarisation wave optics optics physics

Polarisation of light establishes

  1. corpuscular theory of light

  2. quantum nature of light

  3. transverse nature of light

  4. all of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Polarisation of light establishes that light are transverse in nature, otherwise it was believed that they are longitudinal waves, like the sound waves.

Multiple choice polarisation of light polarisation wave optics optics physics

A ray of light is incident on the surface of  a glass plate at an angle of incidence equal to Brewster's angle $\phi$. If $\mu$ represents the  refractive index of glass with respect to air, then the angle between the reflected and the refracted rays is

  1. 90$^o$ + $\phi$
  2. $sin^{-1}$( $ \mu cos \phi$)
  3. 90$^o$
  4. 90 $-sin^{-1}$ $\left (\displaystyle \frac{sin\phi }{\mu}\right )$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When angle of incidence is equal to the Brewster's angle then, the angle between reflected and refracted rays is $ { 90 }^{ o }$

Multiple choice polarisation of light polarisation wave optics optics physics

Human eye:

  1. can detect polarized light

  2. cannot detect polarization of light

  3. can detect only circularly polarized light

  4. can detect only linearly polarized light
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Polarization changes when plane of vibration of polarized light changes.
Human eye is insensitive to change in polarization and hence, cannot detect polarization of light.

Multiple choice polarisation of light polarisation wave optics optics physics

Polarisation of light was first successfully explained by:

  1. Corpuscular theory

  2. Huygens' wave theory

  3. Electromagnetic wave theory

  4. Planck's theory
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electromagnetic wave theory explains light as being composed of electric field vibrating in planes.
Polarisation of light refers to vibrating electric field in a particular plane.