properties of electromagnetic waves 2

• What are electromagnetic waves?

  A group of waves including visible light
• What is the speed of light in a vacuum?

  Approximately $3 \times 10^8 \text{ m/s}$
• What does it mean that electromagnetic waves are transverse waves?

  Oscillations occur perpendicular to travel direction
• Why can electromagnetic waves be polarized?

  Because they are transverse waves
• What forms the electromagnetic spectrum?

  Different types of electromagnetic waves
• How are electromagnetic waves classified in the spectrum?

  Based on their frequencies and wavelengths
• Which electromagnetic waves have the longest wavelengths?

  Radio waves
• Which electromagnetic waves have the highest frequencies?

  Gamma waves
• What part of the electromagnetic spectrum can humans see?

  Visible light
• How do different frequencies of visible light appear to humans?

  As different colors
• What can happen when electromagnetic waves interact with matter?

  They can be absorbed, reflected, or transmitted
• What factors influence the interaction of electromagnetic waves with matter?

  The substance and type of electromagnetic wave
• What effect can absorption of infrared waves have?

  Warming
• What effects can absorption of ultraviolet waves cause?

  Ionization
• What are some applications of radio waves?

  Used for communication
• What are X-rays commonly used for?

  Medical imaging
• What are microwaves primarily used for?

  Cooking
• How are the applications of electromagnetic waves determined?

  By their properties, like penetration ability