Quiz  /  Electromagnetic Spectrum Class 9 MCQ Questions With Answers

  • 1. 
    What does the letter 'h' represent in the formula E = hv?

  • Planck's constant
  • Hydrogen
  • Energy

  • 2. 
    The visible light spectrum ranges between

  • radar waves and X-rays.
  • television waves and infrared rays.
  • infrared rays and ultraviolet rays.
  • ultraviolet rays and gamma rays.

  • 3. 
    Newton’s prism experiments showed that white sunlight is made up of

  • the full electromagnetic spectrum.
  • only blue light.
  • all the colors of the visible spectrum.
  • only the longest wavelengths.

  • 4. 
    You are able to see the road cone in the picture because

  • orange light travels faster than any other light
  • the orange light was absorbed into the cone and all other colors were reflected
  • the orange light was reflected and all other colors were absorbed
  • only orange light struck the road cone

  • 5. 
    Infrared rays have a shorter wavelength than

  • Ultraviolet ray.
  • X-rays.
  • radar waves.
  • gamma rays

  • 6. 
    The energy for a quantum of light is 2.84x10-19J. What is the wavelength. (λ=hc/E)

  • 6.97x10-45m
  • 6.97x1045m
  • 6.97x10-7m
  • 6.97x107m

  • 7. 
    The height of the wave is known as the _____________.

  • amplitude
  • crest
  • trough
  • wavelength

  • 8. 
    What type of wave spreads out and goes through an opening or around corner?

  • Reflection
  • Refraction
  • Interference
  • Diffraction

  • 9. 
    X-ray photographs show softer tissue

  • as invisible.
  • as dark, highly exposed areas.
  • the same as dense bones.
  • as bright white areas.

  • 10. 
    This type of EM wave shows a break in bones.

  • gamma ray
  • x-ray
  • brokenometer
  • radio wave

  • 11. 
    What is the frequency of a light that has the Energy of 2.84x10-19. (v=E/h)

  • 4.30x1014Hz
  • 4.30x10-14Hz
  • 4.30x10-54Hz
  • 4.30x1054Hz

  • 12. 
    Infrared waves are used in__________________.

  • Bath tubs
  • Microwaves
  • Remote Controls
  • Tanning

  • 13. 
    Light in the form of a particle that has discrete amount of energy is called a

  • Charm
  • Photon
  • Exciton
  • Muon

  • 14. 
    ________ is an EM wave that has the LEAST energy.

  • radio
  • gamma rays
  • microwaves
  • visible light

  • 15. 
    Light acts like

  • a wave.
  • a particle.
  • Both a wave and a particle
  • neither a wave nor a particle.

  • 16. 
    To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

  • wavelength.
  • intensity.
  • refraction.
  • amplitude.

  • 17. 
    The waves with the longest wavelengths in the electromagnetic spectrum are

  • Infrared rays.
  • radio waves
  • gamma rays
  • X-rays

  • 18. 
    The orca uses this behavior of waves to locate food.

  • Refraction
  • Reflection
  • Absorption
  • Diffraction
  • Interference

  • 19. 
    Electromagnetic waves vary in

  • the speed they travel in a vacuum.
  • wavelength and frequency.
  • the way they reflect.
  • the orientation of their electric and magnetic fields.

  • 20. 
    What is the Energy of a blue light with the frequency of 6.91x1014Hz? (E=hv)

  • 4.56x1049J
  • 9.55x10-49J
  • 4.56x10-19J
  • 5.82x1019J

  • 21. 
    Refraction is the bending of a wave disturbance as it passes from one _________ into another.

  • glass
  • medium
  • area
  • boundary

  • 22. 
    The full range of frequencies of electromagnetic radiation is called

  • visible light.
  • radio waves.
  • the electromagnetic spectrum.
  • invisible radiation.

  • 23. 
    A rainbow forms when white light separates into different colors during?

  • Absorption
  • Scattering
  • Refraction
  • Diffraction

  • 24. 
    Which of the following occurs as a light wave bends when it passes from one medium into another?

  • constructive interference
  • refraction
  • destructive interference
  • reflection

  • 25. 
    This type of EM wave can cause skin cancer.

  • microwaves
  • ultraviolet ray
  • radio
  • infrared
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