Sound and Light

Electromagnetic waves are

• transverse
• longitudinal

Electromagnetic waves

• can travel through a vacuum
• need a medium to travel through

Which of these electromagnetic waves has the shortest wavelength?

• radio waves
• infrared waves
• x-rays
• ultraviolet waves

Compared to the wavelength of ultraviolet waves, the wavelength of infrared waves is

• shorter
• longer
• the same

Compared to the velocity of radio waves, the velocity of visible light waves is 

• slower
• faster
• the same

The source of all electromagnetic waves is

• heat
• magnetic fields
• electric fields
• vibrating charges

Which of the following is fundamentally different from the others?

• sound waves
• x-rays
• gamma rays
• light waves

The main difference between a radio wave and a light wave is its

• speed
• wavelength
• both speed and wavelength
• none of the above

The main difference between a radio wave and a sound wave is its

• wavelength
• energy
• amplitude
• basic nature

If the sun were to disappear right now, we wouldn't know it for 8 minutes because it takes 8 minutes

• for the sun to disappear
• to operate receiving equipment in the dark
• for light to travel from the sun to the earth
• all of the above