Electromagnetic Waves

Electromagnetic waves vary in

• the speed they travel in a vacuum.

• wavelength and frequency.

• the way they reflect.

• the orientation of their electric and magnetic fields.

The waves with the longest wavelengths in the electromagnetic spectrum are

• Infrared rays.

• radio waves

• gamma rays

• X-rays

X-ray photographs show softer tissue

• as invisible.

• as dark, highly exposed areas.

• the same as dense bones.

• as bright white areas.

Cellular telephones utilize

• radar waves.

• very high frequency waves.

• very low frequency waves.

• microwaves.

Which is an example of a radio wave

• television

• heat lamp

• vision

• sun light

The higher the frequency the ______ the energy. 

• higher
• lower
• neither, stays the same

Which of the following is true for sound waves?

• They require a medium.

• They are unrelated to vibrations.

• They cannot travel through liquids

• They can travel in a vacuum

Which distance represents the wavelength?

• W

• X

• Y

• Z

Which distance represents the amplitude?

• W

• X

• Y

• Z

Point A represents what?

• Trough

• Midpoint

• Crest

• node