Electromagnetic Waves intro

Can humans see all the types of electromagnetic waves?

• Yes, that's how our eyes work

• No, we can only see microwaves, infrared, and visible light

• No, we can only see visible light

• No, we can't see any of them

Which sentence is true about the colors of visible light?

• Red light has the longest wavelength compared to the other colors.

• Red light has the highest frequency compared to the other colors.

• All the colors have the same wavelength.

• All the colors have the same frequency.

Which comparison is true about the colors of visible light?

• Orange light has a longer wavelength than green light.

• Blue light has a longer wavelength than red light.

• Green light has a higher frequency than violet light.

• Red light has a higher frequency than violet light.

Can electromagnetic waves travel through a vacuum? (like outer space, with no air)

• Yes, definitely

• Some of them can

• No

Which wave behavior happens when a flashlight beam bounces off a mirror?

• Reflection

• Refraction

• Diffraction

• Absorption

Which wave behavior happens when light goes into the plastic lens of a pair of eyeglasses, and the light bends its path?

• Reflection

• Refraction

• Diffraction

• Absorption

Fireworks explode about 1000 meters away from where you are standing. Will the light or the sound reach you first?

• Light, because light travels much much faster than sound

• Sound, because sound travels through air better than light does

• They will both reach you at the same time

Which of the following diagrams represents the refraction of waves?

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During a thunderstorm, which of the following travels at a speed closest to 300,000,000 m/s?

• wind from the storm

• sound from the thunder

• light from the lightning

• rain from the storm clouds

Electromagnetic waves with very low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum?

• gamma rays

• infrared waves

• radio waves

• x-rays