6.2.1 The Electromagnetic Spectrum

• Electromagnetic waves are transverse waves that transmit energy through the oscillation of electric and magnetic fields
• Electromagnetic waves require a medium to travel through space.

  False
• The electromagnetic spectrum is composed of various types of electromagnetic waves, each with distinct wavelengths and frequencies
• Match the region of the electromagnetic spectrum with its examples:

  Radio waves ↔️ AM/FM radio

  Microwaves ↔️ Radar

  Infrared ↔️ Night vision

  Visible light ↔️ Light bulbs
• Infrared waves are used for thermal radiation and night vision.
• X-rays are used in medical imaging because they can penetrate skin.
• The wavelength of an electromagnetic wave is the distance between consecutive peaks or troughs
• Match the region of the electromagnetic spectrum with its properties:

  Microwaves ↔️ Used for radar

  Infrared ↔️ Felt as heat

  Ultraviolet ↔️ Can damage DNA

  Gamma rays ↔️ Used in cancer treatment
• As the wavelength of an electromagnetic wave decreases, its frequency increases.
• What two primary characteristics distinguish the different types of electromagnetic waves in the spectrum?

  Wavelength and frequency
• Radio waves have the longest wavelength
• All electromagnetic waves have the same frequency.

  False
• Which type of electromagnetic wave has the highest frequency?

  Gamma rays
• Match the electromagnetic wave region with its typical applications:

  Microwaves ↔️ Microwave ovens

  Infrared ↔️ Thermal imaging

  X-rays ↔️ Medical imaging
• Order the regions of the electromagnetic spectrum from longest wavelength to shortest wavelength:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared

  4️⃣ Visible light

  5️⃣ Ultraviolet

  6️⃣ X-rays

  7️⃣ Gamma rays
• Infrared waves are felt as heat
• X-rays can penetrate skin and are used for medical imaging.
• What is the wavelength range of visible light?

  400-700 nm
• Match the electromagnetic wave region with its common daily life applications:

  Radio waves ↔️ Television broadcasts

  Microwaves ↔️ Satellite communications

  Ultraviolet ↔️ Tanning beds
• What is a common danger associated with ultraviolet (UV) waves?

  Skin cancer
• Exposure to X-rays can increase the risk of cancer