4.4. The Electromagnetic Spectrum

• Order the types of electromagnetic waves from lowest to highest frequency:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared waves

  4️⃣ Visible light

  5️⃣ Ultraviolet waves

  6️⃣ X-rays

  7️⃣ Gamma rays
• What is one application of infrared waves?

  Thermal imaging
• What type of electromagnetic wave is used in medical imaging?

  X-rays
• The electromagnetic spectrum refers to the full range of frequencies and wavelengths
• What is one application of radio waves?

  Communication
• Visible light has a wavelength range of 380 nm to 700 nm.
• Gamma rays are used in cancer treatment and sterilization.
• The electromagnetic spectrum includes various types of waves
• The relationship between frequency and wavelength is described by c = fλ
• Microwaves have a frequency range of 300 MHz to 300 GHz
• Ultraviolet waves have a wavelength range of 10 nm to 400 nm
• The electromagnetic spectrum includes various types of waves, each with a specific range of frequencies and wavelengths
• Infrared waves are used in thermal imaging and remote controls.


  True
• Match the wave type with its primary application:

  Radio Waves ↔️ Communication

  Microwaves ↔️ Cooking

  Infrared Waves ↔️ Thermal imaging

  Visible Light ↔️ Photography

  Ultraviolet Waves ↔️ Sterilization

  X-rays ↔️ Medical imaging

  Gamma Rays ↔️ Cancer treatment
• Microwaves are used in cooking and radar applications.


  True
• Higher frequency waves have shorter wavelengths
• What equation relates frequency, wavelength, and the speed of light?

  $c =$$f\lambda$
• Microwaves are used in radar systems.

  True
• Ultraviolet waves are used in tanning.


  True
• Frequency and wavelength are inversely related in the electromagnetic spectrum.


  True
• Radio waves have the highest frequency in the electromagnetic spectrum.

  False
• What is one application of microwaves?

  Cooking
• What is one application of gamma rays?

  Cancer treatment
• The electromagnetic spectrum consists of waves with distinct frequencies and wavelengths.

  True
• Frequency and wavelength are directly proportional.

  False
• Radio waves are used for broadcasting.


  True
• Ultraviolet waves are used for sterilization and tanning
• What equation describes the relationship between frequency, wavelength, and the speed of light?

  c = f\lambda</latex>
• What are infrared waves used for besides thermal imaging?

  Remote controls
• Which type of electromagnetic wave is used in thermal imaging?

  Infrared waves
• Match the type of electromagnetic wave with its application:

  Radio waves ↔️ Broadcasting

  Microwaves ↔️ Cooking

  Infrared waves ↔️ Remote controls

  Visible light ↔️ Photography
• Match the wave type with its frequency range:

  Radio waves ↔️ 3 kHz - 300 GHz

  Microwaves ↔️ 300 MHz - 300 GHz

  Infrared waves ↔️ 300 GHz - 430 THz

  Visible light ↔️ 430 THz - 790 THz
• Visible light has a wavelength range of 380 nm to 700 nm
• Order the waves from lowest to highest frequency:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared waves

  4️⃣ Visible light

  5️⃣ Ultraviolet waves

  6️⃣ X-rays

  7️⃣ Gamma rays
• What is the wavelength range of radio waves?

  1 mm - 100 km
• What does the electromagnetic spectrum encompass?

  Frequencies and wavelengths
• What is the frequency range of visible light in terahertz (THz)?

  430 THz - 790 THz
• What is the primary application of radio waves?

  Communication, broadcasting
• Order the waves from lowest to highest frequency:

  1️⃣ Radio Waves

  2️⃣ Microwaves

  3️⃣ Infrared Waves

  4️⃣ Visible Light

  5️⃣ Ultraviolet Waves

  6️⃣ X-rays

  7️⃣ Gamma Rays
• Energy is directly proportional to the frequency of a wave and is described by the equation $E =$$hf$