The video tutorial compares light waves and sound waves, highlighting their differences. Light waves are electromagnetic and can travel through a vacuum, while sound waves are mechanical and require a medium. Light waves are transverse, with oscillations perpendicular to wave direction, whereas sound waves are longitudinal, with oscillations parallel to wave direction. The speed of light is much faster than sound, explaining why we see lightning before hearing thunder. Amplitude and frequency have different meanings in light and sound, relating to intensity and color for light, and volume and pitch for sound.

What is a key characteristic of light waves that allows them to travel through a vacuum?

• They require a material medium.

• They are elastic waves.

• They are mechanical in nature.

• They are electromagnetic in nature.

Why can't sound waves travel through a vacuum?

• They are electromagnetic in nature.

• They require a material medium for propagation.

• They travel too slowly.

• They are transverse waves.

What type of wave is a light wave?

• Elastic wave

• Mechanical wave

• Transverse wave

• Longitudinal wave

In which direction do the oscillations of a transverse wave occur?

• In a random direction

• In a circular motion

• Perpendicular to the wave's advance

• Parallel to the wave's advance

What type of wave is a sound wave?

• Longitudinal wave

• Transverse wave

• Electromagnetic wave

• Mechanical wave

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What is the approximate speed of light waves in air?

• 300 meters per second

• 330 meters per second

• 3 x 10^8 meters per second

• 3 x 10^6 meters per second

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Why do we see lightning before hearing thunder?

• Sound waves are brighter than light waves.

• Light waves travel faster than sound waves.

• Sound waves travel faster than light waves.

• Light waves are louder than sound waves.

What does the amplitude of a light wave indicate?

• The speed of the light

• The pitch of the light

• The intensity of the light

• The volume of the light

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NGSS.MS-PS4-1

What does the frequency of a sound wave determine?

• The intensity of the sound

• The color of the sound

• The pitch of the sound

• The speed of the sound

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