EM Waves

EM Waves

By Barbara Isidoro

Multiple Choice

Which of the following property of a wave (marked on the illustration) represents the crest?

• point A

• point B

Crest- highest point of the wave

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Trough- lowest point of the wave​

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Crests and Troughs

Multiple Choice

What is the wavelength of a wave?

• The horizontal distance between two crests or troughs of a wave

• The height of a wave from crest to trough

• The height of a wave from origin to a crest or trough

• The total distance a wave will travel through a medium

• Wavelength refers to the length of a wave from one peak to the next.

• Amplitude refers to the height of a wave as measured from the highest point on the wave (peak or crest) to the lowest point on the wave (trough).

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Wavelength and Amplitude

Multiple Choice

Which wave has a greater frequency?

• Wave A

• Wave B

Wave frequency is the number of waves that pass a fixed point in a given amount of time.

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Frequency

Multiple Choice

If a wave has a greater frequency, what happens to the wavelength?

• increases

• decreases

• stays the same

• Frequency and wavelength are inversely proportional to each other.

• The wave with the greatest frequency has the shortest wavelength.

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Frequency and Wavelength

Multiple Choice

If a wave has a short wavelength, it will have __________ energy.

• low

• high

• medium

• A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.

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Wavelength, Frequency and Energy

Multiple Choice

How are Electromagnetic waves different from Mechanical waves?

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

• EM waves have very short wavelengths

• EM waves transmit energy instead of matter

• EM waves can change direction by reflection

• electromagnetic spectrum is simply the full range of wave frequencies that characterizes solar radiation.

• divided into the following sections: radio, microwave, infrared, visible, ultraviolet, x-ray, and gamma ray (from longest to shortest wavelengths)

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EM WAVES