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Wave Optics Test - 59
Result
Wave Optics Test - 59

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  • Question 1/10
    4 / -1

    Solutions

  • Question 2/10
    4 / -1
    Assertion The cloud in sky generally appears to be whitish.
    Reason Diffraction due to clouds is efficient in equal measure at all wavelengths.
  • Question 3/10
    4 / -1
    Assertion Television signals are received through sky-wave propagation.
    Reason The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical frequency.
  • Question 4/10
    4 / -1
    Assertion It is necessary to use satellites for long distance T.V. transmission.
    Reason The television signals are low frequency signals.
  • Question 5/10
    4 / -1
    Assertion The electrical conductivity of earth\'s atmosphere decrease with altitude.
    Reason The high energy particles (i.e., γ-rays and cosmic rays) coming from outer space and entering our earth\'s atmosphere causes ionisation of the atoms of the gases decreases with increase in altitude
  • Question 6/10
    4 / -1
    Assertion The pattern and position of fringes always remain same even after the introduction of transparent medium in a path to one of the slits.
    Reason The central fringe is bright or dark does not depend upon the initial phase difference between the two coherence sources.
    Solutions

  • Question 7/10
    4 / -1
    Assertion In Hertz experiment, the electric vector of radiation produced by the source gap is parallel to the gap.
    Reason Production of sparks between the detector gap is maximum when it is placed perpendicular to the source gap.
  • Question 8/10
    4 / -1
    Assertion For cooking in a microwave oven, food is always kept in metal containers.
    Reason The energy of microwave is easily transferred to the food in metal container.
    Solutions

  • Question 9/10
    4 / -1
    Assertion X-rays astronomy is possible only from satellites orbiting the earth.
    Reason Efficiency of X-rays telescope is large as compared to any other telescope.
  • Question 10/10
    4 / -1
    Assertion Short wave bands are used for transmission of radio waves to a large distance.
    Reason Short waves are reflected by ionosphere.
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