Electromagnetic Spectrum

What is the electromagnetic spectrum?

• A type of sound wave

• A range of light waves organized by frequency and wavelength

• A diagram that charts sound waves

• A type of wave that cannot travel through space

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Which type of electromagnetic wave has the longest wavelength?

• Microwaves

• X-rays

• Radio waves

• Ultraviolet waves

What are microwaves commonly used for?

• Night vision instruments

• Taking X-ray pictures of bones

• Cooking food and transmitting information

• Protecting skin from the sun

Which type of electromagnetic wave is used in night vision instruments?

• Visible light

• Infrared waves

• Gamma rays

• Radio waves