Physics Quiz - Electromagnetic Spectrum

20 Questions | Total Attempts: 78

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Electromagnetic Spectrum Quizzes & Trivia

Questions and Answers
  • 1. 
    A group of wavelengths (or) frequencies is known as
    • A. 

      Group of colours

    • B. 

      Spectrum

    • C. 

      Colour band

    • D. 

      None

  • 2. 
    Electromagnetic radiations waves are:
    • A. 

      Mechanical

    • B. 

      Longitudinal

    • C. 

      Transverse

    • D. 

      Stationary

  • 3. 
    Electric heater emits
    • A. 

      IR radiations

    • B. 

      Visible spectrum

    • C. 

      UV rays

    • D. 

      Micro waves

  • 4. 
    A device that can't absorb IR-radiations is
    • A. 

      Flint glass

    • B. 

      Borosilicate glass

    • C. 

      Hard glass

    • D. 

      Soda glass

  • 5. 
    Prisms made up of the following is used to observe the infrared radiations
    • A. 

      Ordinary glass

    • B. 

      Rock salt

    • C. 

      Epsom Salt

    • D. 

      None

  • 6. 
    Which of the following emits infrared radiations ?
    • A. 

      Hot iron

    • B. 

      Ice

    • C. 

      Freezing mixture

    • D. 

      Wet cloth

  • 7. 
    The velocity of electromagnetic waves C=
    • A. 

      ν/λ

    • B. 

      νλ

    • C. 

      λ/ν

    • D. 

      ν+λ

  • 8. 
    The direction of propagation of electro magnetic waves
    • A. 

      Perpendicular to only electric field

    • B. 

      Perpendicular to only magnetic field

    • C. 

      Electric and magnetic fields perpendicular to each other and also perpendicular to the direction of their propagation

    • D. 

      None

  • 9. 
    The wavelength limit of visible spectrum
    • A. 

      0.1 µm - 0.7 µm

    • B. 

      0.4 µm - 0.7 µm

    • C. 

      0.7 µm - 1.0 µm

    • D. 

      0.2 µm - 0.9 µm

  • 10. 
    Visible spectrum is due to :
    • A. 

      Excitation of ē s

    • B. 

      Deexcitation of ē s

    • C. 

      Vibrated atoms

    • D. 

      Rotation of atoms

  • 11. 
    The charateristic colour emitted by the substance is depends on
    • A. 

      The colour of the substance

    • B. 

      The state of the substance

    • C. 

      Characteristic properties of the atoms present in the substance

    • D. 

      None

  • 12. 
    The wavelength limit of IR is .....
    • A. 

      0.1 µm - 0.7 µm

    • B. 

      0.7 µm - 100 µm

    • C. 

      10 µm - 10 m

    • D. 

      1 m - 100 km

  • 13. 
    Which of the following is used to detect the IR ?
    • A. 

      Thermometers

    • B. 

      Thermopiles

    • C. 

      Bolometer

    • D. 

      All

  • 14. 
    The rays emitted by molecules when they change their state of rotational or vibrational motion are
    • A. 

      Visible spectrum

    • B. 

      Micro waves

    • C. 

      Radio waves

    • D. 

      Infrared waves

  • 15. 
    The radiations, those find application in physio - therapy are
    • A. 

      Visible spectrum

    • B. 

      Micro waves

    • C. 

      Infrared waves

    • D. 

      Radio waves

  • 16. 
    The wavelength range of microwaves is
    • A. 

      0.1 µm - 0.7 µm

    • B. 

      10 µm - 10 m

    • C. 

      0.7 µm - 100 µm

    • D. 

      0.4 µm - 1 nm

  • 17. 
    Micro waves are produced when
    • A. 

      Excited electrons in atoms jump back to their normal states

    • B. 

      Electromagnetic oscillators oscillate with high frequency

    • C. 

      Electrons are accelerated

    • D. 

      Transitions of the electrons in atoms

  • 18. 
    Micro waves are used in
    • A. 

      Radar

    • B. 

      Telemetry

    • C. 

      Micro wave oven

    • D. 

      All the above

  • 19. 
    Radio waves are produced when
    • A. 

      Electromagnetic oscillators oscillate with low frequency

    • B. 

      Electromagnetic oscillators oscillate with high frequency

    • C. 

      Transition of electrons in atoms

    • D. 

      Excited electrons in atoms jump back to their normal state

  • 20. 
    Mapping of the radio emissions from extra-terrestrial sources is termed as
    • A. 

      Halography

    • B. 

      Radio-astronomy

    • C. 

      Meteorology

    • D. 

      None

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