Electromagnetic Waves

How are Electromagnetic waves different from Mechanical waves?

• EM waves have very short wavelengths

• EM waves transmit energy instead of matter

• EM waves can travel through the vacuum of space (without particles)

• EM waves can change direction by reflection

Wavelength and Frequency are related in that...

• they are always the same

• when one increases, the other decreases (inversely proportional)

• there is no correlation

• they both vary in an irregular pattern

If all three are waves of light, which wave has the largest speed?

• A
• B
• C
• None (same speed)

The following diagram shows a wave that begins with a ________frequency and transitions to a ________frequency.

• low, high

• high, low

• high, high

• None of these

What is an example of a radio wave?

• Vision

• Television

• Heat lamp

• Sunlight

Electromagnetic waves vary in...

• The way they reflect.

• The speed they travel in a vacuum.

• Wavelength and frequency.

• The orientation of their electric and magnetic fields.

Cellular phones utilize...

• microwaves

• radar waves

• very high frequency waves

• very low frequency waves

Infrared rays have a shorter wavelength than...

• radio waves

• gamma rays

• X-rays

• Ultraviolet rays

Which one is a type of ionizing radiation?

• radio waves

• microwaves

• gamma rays

• infrared

The electrical field and magnetic field of electromagnetic wave are...

• parallel

• perpendicular

• symmetrical

• all of the above