The Physics of Light and Sound

I brought time over to the other side and multiplied to get 686 m/s but that wasn't correctIn summary, using the equation v = D/T, we can calculate that 686 m is the distance sound travels in 2 seconds. However, this answer may not be correct because it does not consider the context, such as the presence of a rocky cliff. The conversation also brings up the topic of the Physics of light and sound.
  • #1
Bruh23
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Homework Statement
You are standing at some distance from a rocky cliff and shout loudly. You hear the echo 2 seconds later. How far is the rocky cliff? Take the speed of sound in air as 343 m/s and round off your answer to the nearest integer (whole number).
Relevant Equations
v = Distance/Time
I brought time over to the other side and multiplied to get 686 m/s but that wasn't correct
 
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  • #3
v = D/T
v*T = D/T*T
343 m/s * 2s = D
D = 686 m
 
  • #4
686 m is the distance sound travels in 2 seconds. Are you 686 m away from the point where you produced the sound when you hear the echo?
 
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  • #5
You are doing math blindly, without consideration for context. There is a reason they've told you you're facing a rocky cliff.

Or, more simply: you have not actually answered the question asked. What is the question that was asked?
 
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  • #6
Why the "Physics of light and sound"?
 
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  • #7
nasu said:
Why the "Physics of light and sound"?
Likely the name of the chapter OP is studying.
 
  • #8
1674015095339.png


Can we conclude that you figured it out?
 
  • #9
nasu said:
Why the "Physics of light and sound"?
It refers to how the OP likes to dress when studying Physics. See their Avatar...

1674245512775.png
 
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1. What is the difference between light and sound?

Light and sound are both forms of energy, but they differ in how they travel and interact with matter. Light is an electromagnetic wave that can travel through a vacuum, while sound is a mechanical wave that requires a medium, such as air, to travel through. Light can also travel at a much faster speed than sound.

2. How does light behave as both a particle and a wave?

This is known as the wave-particle duality of light. In some experiments, light behaves as a wave, exhibiting properties such as interference and diffraction. In other experiments, it behaves as a stream of particles, known as photons. This behavior is explained by quantum mechanics, which states that particles can also exhibit wave-like behavior.

3. What is the speed of light?

The speed of light in a vacuum is approximately 299,792,458 meters per second (m/s). This is considered to be the fastest speed at which anything in the universe can travel.

4. How does sound travel through different mediums?

Sound travels through a medium by causing particles in the medium to vibrate. In a solid, the particles are closely packed together, allowing sound to travel quickly. In a liquid, the particles are more spread out, so sound travels at a slower speed. In a gas, the particles are even more spread out, resulting in a slower speed of sound.

5. How do light and sound interact with matter?

When light and sound waves encounter matter, they can be absorbed, reflected, or transmitted. The interaction depends on the properties of the matter, such as its density and composition. For example, light is absorbed by opaque objects, while sound can be reflected by hard surfaces.

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