PES - EMS, Light, Vision

Which has the LONGEST wavelength and therefore the lowest frequency/energy? These waves are used in broadcasting, wifi, and texting.

• Gamma rays

• Visible light

• Radio waves

• Infrared rays

Which electromagnetic waves are used in devices such as heat lamps and TV remote controls?

• Ultraviolet rays

• Infrared Rays

• Microwaves

How much of the electromagnetic spectrum is made up of visible light?

• A small portion of it

• Most of it

• All of it

• None of it

Which section of the electromagnetic spectrum is the ONLY part humans can see?

• X-Rays

• Gamma Rays

• Visible Light

• Ultraviolet Rays

Which electromagnetic waves are used by doctors to detect broken bones inside your body?

• X-Rays

• Gamma Rays

• Ultraviolet Rays

• Infrared Rays

Which has the SHORTEST wavelength and therefore the highest frequency/most energy? Hint: These waves are also used in cancer treatments.

• Gamma Rays

• Radio Waves

• Ultraviolet Rays

• X-rays

What high energy waves are given off by radioactive materials?

• Gamma Rays

• Microwaves

• Ultraviolet Rays

• Radio Waves

Which wave has a low frequency, a long wavelength, and low energy?

• A

• B

• Not enough information to determine

Which wave has a high frequency, a short wavelength, and high energy?

• A

• B

• Not enough information to determine

True or false: as you move along the spectrum, radio to gamma waves, the wavelengths decrease in size (get smaller)

• true
• false