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Wave Optics Quiz-1

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 


Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.



Q1. The phenomenon of polarization of light indicates that
  •  Light is a longitudinal wave
  •  Light is a transverse wave
  •  Light is not a wave
  •  Light travels with the velocity of 3×108 ms-1
Solution
The polarization is the property of electromagnetic waves such as light which describes the direction of their transverse electric field. More generally, the polarization of transverse wave describes the direction of oscillation, in the plane perpendicular to the direction of travel. Longitudinal waves such as sound waves do not exhibit polarization, becomes for these waves the direction of oscillation is along the direction of travel.

Q2.Diffraction and interference of light suggest
  •  Nature of light is electro-magnetic
  •  Wave nature
  •  Nature is quantum
  •  Nature of light is transverse
Solution
Wave nature

Q3.  The 21 cm radio wave emitted by hydrogen in interstellar space is due to the interaction called the hyperfine interaction is atomic hydrogen. the energy of the emitted wave is nearly
  •  10-17 Joule
  •  1 Joule
  •  7×10-8 Joule
  •  10-24 Joule
Solution
                    


Q4. The fringe width in Young’s double slit experiment increases when
  •  Wavelength increases
  •  Distance between the slits increases
  •  Distance between the source and screen decreases
  •  The width of the slits increases
Solution
β=λD/d⇒β∝λ

Q5.Biological importance of Ozone layer is
  •  It stops ultraviolet rays
  •  Ozone rays reduce green house effect
  •  Ozone layer reflects radio waves
  •  Ozone layer controls O2/H2 radio in atmosphere
Solution
 It stops ultraviolet rays

Q6. A parallel beam of light of intensity I_0 is incident on a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected from lower surface. The ratio of maximum to minimum intensity in interference region of reflected rays is


  •  


  • 5/8

  •  8/5

Solution
               




Q7.A beam of ordinary unpolarised light passes through a tourmaline crystal C1 and then it passes through another tourmaline crystal C2, which is oriented such that its principal plane is parallel to that of C2. The intensity if emergent light isI0. Now C2 is rotated by 60° about the ray. The emergent ray will have an intensity
  •  2I0
  •  I0/2
  •  I0/4
  •  I0/√2
Solution
                  



Q8.Which one of the following is INCORRECT statement in the transmission of electromagnetic waves
  • Ground wave propagation is for high frequency transmission
  •  Sky wave propagation is facilitated by ionospheric
  •  Space wave is of high frequency and is suitable for line of sight communication
  •  Space wave is used for satellite communication
Solution
Ground wave propagation is for high frequency transmission

Q9.Find the thickness of a plate which will produce a change in optical path equal to half the wavelength λ of the light passing through it normally. The refractive index of the plate μ is
  •  Î»/4(μ-1)
  •  2λ/4(μ-1)
  •  Î»/((μ-1) )
  •  Î»/2(μ-1)
Solution
From (μ-1)t=nλ

Q10. Critical angle for certain medium is sin-1⁡(0.6). The polarizing angle of that medium is
  •  tan-1⁡[1.5]
  •  sin-1[0.8]
  •  tan-1⁡[1.6667]
  • tan-1⁡[0.6667]
Solution                    
                              






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