5.3 Video Lesson: EM Spectrum

All electromagnetic waves travel at the same speed through empty space. That speed, called the speed of light, is about

• 300 meters per second

• 300 miles per hour

• 300 million meters per second (3.0 x 10⁸ m/s)

• 300 thousand meters per second (3.0 x 10⁵ m/s)

Review question from Concept 1: Which of the following do ALL electromagnetic waves have in common?

• All electromagnetic waves travel toward Earth

• All electromagnetic waves are transverse waves.

• All electromagnetic waves have the same frequency.

• All electromagnetic waves have the same amplitude.

Rank the following types of EM radiation by frequency from HIGHEST frequency to LOWEST frequency: ​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• gamma rays
• x-rays
• ultraviolet rays
• infrared rays
• radiowaves

The only part of the electromagnetic spectrum that can be detected by the human eye is

• ultraviolet light

• infrared light

• visible light

• X rays

The colors in order of the electromagnetic spectrum.

• VIOGYR

• ROYGBIV

• GYORIVB

• YIVORGB

All electromagnetic waves

• have the same wavelength

• have the same frequency

• travel at 300,000,000 m/s

• have the same energy

Radio stations use radio waves to transmit electromagnetic signals.​
​Which of the following best compares radio waves to other waves on the electromagnetic spectrum?

• Radio waves have the highest frequency of all electromagnetic waves.

• Radio waves have the longest wavelength of all electromagnetic waves.

• The frequency of radio waves is close to the frequency of ultraviolet radiation.

• The wavelength of radio waves is close to the wavelength of visible light waves.

Which electromagnetic wave comes from the sun to give you Vitamin D?

• microwaves

• x-rays

• gamma rays

• ultraviolet rays

Which part of the electromagnetic spectrum has the highest frequency?

• Gamma rays

• x-rays

• UV rays

• Radio waves

According to the Doppler effect, the dot is

• moving to the right

• moving to the left

• not moving