P5.2 The Electromagnetic Spectrum

• Match the region of the electromagnetic spectrum with its wavelength range:

  Radio Waves ↔️ > 1 mm

  Microwaves ↔️ 1 mm - 1 cm

  Infrared ↔️ 700 nm - 1 mm

  Visible Light ↔️ 400 - 700 nm
• Ultraviolet waves have a wavelength range of 10 - 400 nm
• At what speed do electromagnetic waves travel in a vacuum?

  3 \times 10^{8}</latex> m/s
• Microwaves have the highest energy level in the electromagnetic spectrum.

  False
• Electromagnetic waves travel at the speed of light in a vacuum
• The value of Planck’s constant is approximately $6.626 \times 10^{ - 34}$ J·s
• The electromagnetic spectrum is the entire range of electromagnetic radiation
• Visible light has a moderate energy level in the electromagnetic spectrum
• Match the region of the electromagnetic spectrum with its energy level:

  Radio Waves ↔️ Low

  Visible Light ↔️ Moderate

  X-rays ↔️ Very High

  Gamma Rays ↔️ Extremely High
• What is the frequency range of microwaves?

  300 MHz - 300 GHz
• Ultraviolet waves have a wavelength range from 10 nm to 400 nm
• What is the wavelength range of gamma rays?

  < 0.01 nm
• What is the formula relating energy and frequency of an electromagnetic wave?

  $E =$$hf$
• Ultraviolet waves are used in the curing of plastics
• Regions with longer wavelengths have higher energy.

  False
• What does the electromagnetic spectrum refer to?

  Electromagnetic radiation
• Radio waves have the highest energy level in the electromagnetic spectrum.

  False
• 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
• What is the wavelength range of microwaves in the electromagnetic spectrum?

  1 mm - 1 cm
• Match the region of the electromagnetic spectrum with its frequency range:

  Microwaves ↔️ 300 MHz - 300 GHz

  Infrared ↔️ 430 THz - 300 GHz

  Visible Light ↔️ 750 - 430 THz

  Ultraviolet ↔️ 30 - 750 THz

  X-rays ↔️ 30 - 30,000 PHz

  Gamma Rays ↔️ > 30,000 PHz
• The relationship between wavelength and frequency is directly proportional.

  False
• Electromagnetic waves are transverse waves.


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


  True
• Infrared waves have a longer wavelength than ultraviolet waves.


  True
• What are the two types of fields that make up electromagnetic waves?

  Electric and magnetic
• Infrared waves have a wavelength range from 700 nm to 1 mm
• What is the frequency range of X-rays?

  30 - 30,000 PHz
• Electromagnetic waves travel at the speed of light in a vacuum
• What is the value of Planck’s constant?

  $6.626 \times 10^{ - 34}$ J·s
• What are two applications of gamma rays?

  Cancer treatment, sterilization
• The relationship between wavelength, frequency, and energy is that shorter wavelengths have higher frequency
• What is the frequency range of visible light in the electromagnetic spectrum?

  750 - 430 THz
• Match the property of electromagnetic waves with its description:

  Transverse Waves ↔️ Electric and magnetic fields oscillate

  Perpendicular Fields ↔️ Electric and magnetic fields are at right angles

  In Phase ↔️ Electric and magnetic fields peak together
• The electromagnetic spectrum includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays
• What determines the energy level of electromagnetic radiation?

  Wavelength and frequency
• What is the formula for calculating the energy of an electromagnetic wave?

  $E =$$hf$
• What are the two fields that make up electromagnetic waves?

  Electric and magnetic
• What is the wavelength range of radio waves in the electromagnetic spectrum?

  > 1 mm
• What is the frequency range of microwaves?

  300 MHz - 300 GHz
• Radio waves have a wavelength range greater than 1 mm