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.

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To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

• wavelength.

• intensity.

• refraction.

• amplitude.

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Light acts like

• a wave.

• a particle.

• Both a wave and a particle

• neither a wave nor a particle.

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The full range of frequencies of electromagnetic radiation is called

• visible light.

• radio waves.

• the electromagnetic spectrum.

• invisible radiation.

The waves with the longest wavelengths in the electromagnetic spectrum are

• Infrared rays.

• radio waves

• gamma rays

• X-rays

Cellular telephones utilize

• radar waves.

• very high frequency waves.

• very low frequency waves.

• microwaves.

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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

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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

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High frequency in EM waves equals

• high energy and short wavelength

• high energy and long wavelength

• low energy and short wavelength

• low energy and long wavelength

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The _______________ determines the color of visible light.

• wavelength (and frequency)

• speed

• amplitude

• particles of the medium

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