Understanding Sound and Light Waves

What is the speed of sound in air at standard temperature and pressure?

• 343 m/s

• 299,792,458 m/s

• 1,500 m/s

• 3,000 m/s

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If the wavelength of a sound wave is 1.5 meters and the speed of sound is 343 m/s, what is the frequency of the wave?

• 229 Hz

• 343 Hz

• 1.5 Hz

• 514.5 Hz

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What happens to the speed of sound in air as temperature increases?

• It decreases

• It increases

• It stays the same

• It becomes zero

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What is resonance in the context of sound waves?

• When a sound wave is absorbed by a material

• When an object vibrates at its natural frequency due to a matching external frequency

• When sound waves travel faster than light

• When sound is reflected off a surface

What is the main function of polarized sunglasses?

• To increase brightness

• To block ultraviolet rays only

• To reduce glare by blocking certain orientations of light waves

• To magnify objects

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Which property of radio waves makes them useful for astronomical observations?

• They are easily absorbed by the atmosphere

• They can travel long distances through space

• They are visible to the human eye

• They have high energy

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What is the Doppler Effect?

• The bending of light as it passes through a lens

• The change in frequency or wavelength of a wave in relation to an observer

• The splitting of white light into colors

• The reflection of sound waves

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Which type of electromagnetic wave can pass through the human body but is absorbed by bones?

• Radio waves

• X-rays

• Infrared waves

• Microwaves

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What is an emission spectrum?

• A continuous range of colors

• A set of specific wavelengths emitted by an element

• The reflection of light from a surface

• The absorption of all wavelengths

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Why do different elements produce unique emission spectra?

• Because they have different numbers of protons

• Because they have different arrangements of electrons

• Because they are different colors

• Because they have different masses

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