Electromagnetic waves

• What is the topic of today's video?

  The electromagnetic spectrum
• What are electromagnetic waves classified as?

  Transverse waves
• How do electromagnetic waves oscillate?

  Perpendicular to the direction of energy transfer
• What is the speed of electromagnetic waves in a vacuum?

  $3 \times 10^8 \text{ m/s}$
• What happens to electromagnetic waves when they travel through different mediums?

  They travel at different speeds
• What are the seven basic types of electromagnetic waves?

  • Radio waves
  • Microwaves
  • Infrared
  • Visible light
  • Ultraviolet
  • X-rays
  • Gamma rays
• What is refraction in the context of electromagnetic waves?

  It is when the wave changes direction
• What differentiates the types of electromagnetic waves?

  Their wavelength and frequency
• How are wavelength and frequency related?

  They are inversely related
• If the frequency of a wave increases, what happens to its wavelength?

  It decreases
• Which electromagnetic wave has the largest wavelength?

  Radio waves
• Which electromagnetic wave has the smallest wavelength?

  Gamma rays
• What is the range of wavelengths for radio waves?

  Multiple kilometers
• What is the range of wavelengths for gamma rays?

  Less than a thousandth of a nanometer
• What part of the electromagnetic spectrum can human eyes detect?

  Visible light
• What gives us the different colors we can see?

  The different wavelengths within the visible light region
• What mnemonic can help remember the colors of the rainbow?

  Roy G. Biv
• What comes after violet in the electromagnetic spectrum?

  Ultraviolet
• What comes before red in the electromagnetic spectrum?

  Infrared
• Which types of electromagnetic waves can be ionizing?

  Ultraviolet, X-rays, and gamma rays
• What is the potential effect of ionizing radiation on cells?

  It can cause damage to our cells
• What are the two types of electromagnetic waves used in communication?

  Microwaves and radio waves
• Where do electromagnetic waves come from?

  They come from everywhere
• What can cause gamma rays to be emitted?

  Radioactive decay
• What can cause visible light, ultraviolet, and X-rays to be emitted?

  Electrons dropping down energy levels
• What generates infrared radiation?

  Vibrating bonds that hold molecules together
• What happens to electromagnetic waves once they are emitted?

  They can travel across the universe through empty space
• What can happen when electromagnetic waves come into contact with something?

  They can be reflected, absorbed, or transmitted
• What might happen when electromagnetic waves interact with a surface?

  Some waves might be reflected while others might be absorbed
• What is the conclusion of the video?

  Hope you enjoyed it and see you next time