4.2 The Electromagnetic Spectrum

• The electromagnetic spectrum includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
• Which region of the electromagnetic spectrum has the longest wavelength?

  Radio waves
• The different regions of the electromagnetic spectrum are distinguished by their wavelength and frequency.


  True
• Ultraviolet waves have a wavelength range of 10 nm to 400 nm.
• Match the region of the electromagnetic spectrum with its primary application:

  Radio waves ↔️ Broadcasting

  Microwaves ↔️ Cooking

  Infrared ↔️ Thermal imaging

  Visible light ↔️ Human vision

  Ultraviolet ↔️ Sterilization

  X-rays ↔️ Medical imaging

  Gamma rays ↔️ Cancer therapy
• Visible light is used in photosynthesis.


  True
• Gamma rays have the shortest wavelength and highest frequency in the electromagnetic spectrum.

  True
• Order the regions of the electromagnetic spectrum from longest to shortest wavelength.

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared

  4️⃣ Visible light

  5️⃣ Ultraviolet

  6️⃣ X-rays

  7️⃣ Gamma rays
• Match the region of the electromagnetic spectrum with its typical wavelength range.

  Radio waves ↔️ >1 mm

  Microwaves ↔️ 1 mm to 1 m

  Infrared ↔️ 700 nm to 1 mm

  Visible light ↔️ 400 nm to 700 nm

  Ultraviolet ↔️ 10 nm to 400 nm

  X-rays ↔️ 0.01 nm to 10 nm

  Gamma rays ↔️ <0.01 nm
• What is the region of the electromagnetic spectrum with the longest wavelength?

  Radio waves
• Match the region of the electromagnetic spectrum with its application:

  Microwaves ↔️ Cooking

  Infrared ↔️ Thermal imaging

  Visible light ↔️ Human vision

  Ultraviolet ↔️ Sterilization
• Match the region of the electromagnetic spectrum with its properties:

  Radio waves ↔️ Longest wavelength, lowest frequency

  Gamma rays ↔️ Shortest wavelength, highest frequency

  Infrared ↔️ Moderate energy, moderate wavelength
• What is an example of a device that uses infrared radiation?

  TV remote
• What is the electromagnetic spectrum?

  Range of electromagnetic radiation
• Arrange the regions of the electromagnetic spectrum in order from longest to shortest wavelength:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared

  4️⃣ Visible light

  5️⃣ Ultraviolet

  6️⃣ X-rays

  7️⃣ Gamma rays
• X-rays have a wavelength range of 0.01 nm to 10 nm.


  True
• What is one application of infrared waves?

  Thermal imaging
• Which region of the electromagnetic spectrum is used in vitamin D production?

  Ultraviolet
• Arrange the regions of the electromagnetic spectrum in order from lowest to highest frequency:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared

  4️⃣ Visible light

  5️⃣ Ultraviolet

  6️⃣ X-rays

  7️⃣ Gamma rays
• Wavelength and frequency have an inverse relationship in the electromagnetic spectrum.


  True
• The electromagnetic spectrum includes all types of electromagnetic radiation
• What is the region of the electromagnetic spectrum with the shortest wavelength?

  Gamma rays
• Order the regions of the electromagnetic spectrum from longest to shortest wavelength:

  1️⃣ Radio waves

  2️⃣ Microwaves

  3️⃣ Infrared

  4️⃣ Visible light

  5️⃣ Ultraviolet

  6️⃣ X-rays

  7️⃣ Gamma rays
• As you move from radio waves to gamma rays, wavelength decreases while frequency increases.
• Infrared radiation is used in thermal imaging and remote controls.
• Which region of the electromagnetic spectrum has the highest energy level?

  Gamma rays
• Radio waves are used in broadcasting and communication.
• X-rays have a very high energy level and are used in medical imaging.
• The electromagnetic spectrum is divided into regions based on their wavelength and frequency.wavelength
• Which region of the electromagnetic spectrum has the highest energy level?

  Gamma rays
• Different types of electromagnetic radiation are distinguished by their wavelength and frequency.


  True
• Radio waves are used in broadcasting and communication
• There is an inverse relationship between wavelength and frequency
• Gamma rays are used in cancer therapy due to their high energy levels.

  True