EM Spectrum, Light, and Optics

Most of the waves in the electromagnetic spectrum are

• red light

• ultraviolet light

• invisible

• green light

In free space, electromagnetic waves travel at a

• variety of speeds

• speed dependent on the frequency of the wave

• single, constant speed

• speed of 0 m/s

Radio waves travel

• at the same speed as sound waves

• depending on frequency

• slower than sound waves

• faster than sound waves

Tags

NGSS.HS-PS4-1

If the sun were to disappear, we wouldn't know it for roughly

• 8 minutes

• 8 hours

• 8 seconds

• 8 days

Which of the following is fundamentally different from the others?

• light waves

• x-rays

• radio waves

• sound waves

• gamma rays

Tags

NGSS.MS-PS4-1

Which electromagnetic wave has the shortest wavelength?

• radio

• infrared

• ultraviolet

• light

• x-rays

Tags

NGSS.HS-PS4-1

Which electromagnetic wave has the longest wavelength (lowest frequency)?

• radio

• x-rays

• light

• infrared

• ultraviolet

A major difference between a radio wave and a light wave is

• frequency

• wavelength

• both frequency and wavelength

• neither frequency or wavelength

If the color spectrum ranges from red to violet, then it ranges from

• long wavelength to short wavelength

• low frequency to high frequency

• both of these

A main difference between radio and sound waves is

• their energy

• the amplitude of the waves

• the need for a medium or no medium

• the frequency of the waves