Cell phones transmit and receive signals using

Cell phones work only if they are in a ___ system.

An electromagnetic wave consists of

An electromagnetic wave have fields that travel ___ to one another.

Polarized light consists of waves that vibrate

The only type of electromagnetic wave that you can see is

AM radio waves can travel farther than FM radio waves because

Which of the following is listed in order of increasing energy?

The energy that electromagnetic waves transfer through matter or space is called

A packet of light energy is called a

Which is NOT an electromagnetic wave?

Radar is used to

An infrared camera takes pictures called

Visible light that appears ___ is actually a mixture of many colors

What kind of vitamin does UV rays cause cells to make?

Why does a dentist cover you with a lead apron to take Xrays of your teeth?

The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of

AM signals travel as

FM waves meet the ionosphere. What do they do?

Which is more expensive to operate?

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