📕 Unit 3 Assessment Waves & Radiation

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

• refraction

• intensity

• amplitude

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Infrared rays have a shorter wavelength than

• Ultraviolet ray

• X-rays

• gamma rays

• radio waves

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The full range of frequencies of electromagnetic radiation is called

• visible light

• the electromagnetic spectrum

• radio waves

• invisible radiation

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The waves with the longest wavelengths in the electromagnetic spectrum

• Infrared rays

• gamma rays

• radio waves

• X-rays

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The visible light spectrum ranges between

• radio waves and X-rays

• infrared rays and ultraviolet rays

• television waves and infrared rays

• ultraviolet rays and gamma rays

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What happens to frequency when the energy increases?

• it increases

• it stays the same

• it decreases

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What part of the wave is shown at letter A?

• crest

• wavelength

• trough

• frequency

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Which part of the wave is shown at letter B?

• crest

• wavelength resting point

• trough

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Which part of the wave is shown at letter C?

• crest

• resting point

• wavelength

• amplitude

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