Tyson: The EM Spectrum

All EM waves are _______ and travel at the same speed.

• potatoes

• magnetic

• waves

• light

Frequency is

• the number of crests of a wave that go by in a second

• the speed of sound in a medium
• the measure of energy in a system
• the total distance traveled by an object

The shorter the wavelength, the more __________ is packed in.

• energy
• speed
• frequency
• mass

UV (ultraviolet) light can cause

• improved skin elasticity
• enhanced vision
• increased hair growth
• sunburn and skin cancer

What is the key difference between ultraviolet light and visible light?

• Ultraviolet light has a longer wavelength than visible light.

• Ultraviolet light is less energetic than visible light.

• Ultraviolet light has a shorter wavelength and higher energy than visible light.

• Ultraviolet light is visible to the human eye.

Why do x-ray technicians leave the room during an x-ray procedure?

• To avoid exposure to harmful x-rays.

• To protect the patient from radiation.

• To ensure the machine operates correctly.

• To adjust the x-ray machine remotely.

The EM wave with the longest wavelength is a

• radio waves
• visible light
• infrared waves
• microwaves

Electromagnetic waves are a combination of electrical and magnetic waves that do not need

• a gas
• a medium
• a liquid
• a solid

What did William Herschel discover about light using a thermometer?

• Light is composed of only visible colors.

• Infrared light exists beyond the visible spectrum.

• Ultraviolet light is the hottest form of light.

• Light cannot be measured with a thermometer.

What is the primary purpose of the electromagnetic spectrum?

• To categorize different types of light based on wavelength and energy.

• To classify sound waves.

• To measure the speed of light in a vacuum.

• To explain the behavior of light in space.