Electromagnetic Spectrum

Which of these EM waves do we normally use to heat up our food?

• Visible light

• X-rays

• Radio waves

• Microwaves

Which of these is the EM wave with the highest frequency?

• Gamma rays

• UV rays

• Radio waves

• Visible light

Which of these EM waves has the lowest frequency?

• Infrared waves

• Radio waves

• X-rays

• UV rays

Match the following

• It is used in thermal imaging

• Microwaves

• Has the highest energy of all electromagnetic radiation and is the most damaging to human tissue

• UV rays

• Used in cell phone communication and police radar systems

• Gamma Rays

• Overexposure to this can result in sunburns and skin cancer

• Infrared rays

• Has the longest wavelengths and the lowest frequency

• Radio waves

Both X-rays and gamma rays have higher frequencies than ultraviolet rays.

• True

• False

Reorder the following from shortest wavelength to the longest wavelength.

• ultraviolet waves

• x-rays

• gamma waves

• infrared rays

• visible light

Which has more energy?

• radio/tv waves

• infrared

Which has a higher frequency?

• visible light

• ultraviolet rays

Electromagnetic waves that you can see

• radio waves

• visible light

• x-rays

• ultraviolet rays

Used for medical imaging to diagnose health issues in bones and teeth

• visible light

• ultraviolet rays

• x-rays

• gamma rays