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I'm quite sure there is no emergency vehicle anywhere within which you can travel 300 feet.

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Q: Can you travel 300 feet within any emergency vehicle using siren?
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How can the relative speed of light be constant when the Doppler shift of light suggests addition or subtraction of velocities?

Excellent question! It appears you're trying to connect the frequency of a wave to its velocity through the medium in which it's traveling, and you'll need to uncouple them. Let's look at some things to help you do that. If you've stood alongside a roadway and watched (and listened to) cars coming at you, you notice the pitch is higher as the vehicles approach, then lower as they pass and move away. The air is not moving toward you (unless you are way too close), and the sound is not coming at you "faster" and then "slower". The sound is traveling through the air at the same rate no matter which way the vehicle is moving. Here's what's happening. Sound comes from the source in the form of waves, moving out like an expanding bubble. When the vehicle is coming toward you rapidly, the vehicle shortens the gap between the siren and the next wave. The gap shortens because the sound only travels so fast and no faster, but the vehicle is catching up a little before the next wave comes out. This keeps happening, and if you could see the waves, you would see them bunching up together. The waves are closer. This means that there are more waves in one second's worth of sound. The frequency of sound waves is what gives rise to our experience of pitch. Higher frequency equals higher pitch. You can see what happens when the vehicle recedes. The sound is still traveling at the speed of sound, but because the vehicle is moving away, this has the effect of putting more space in between the waves of sound. there are fewer waves per second as the vehicle moves away from you; the sound hasn't changed velocity. Lower frequency equals lower pitch. It is essentially the same with light. Light, of course, does not need air or any other substance to travel through as sound does. But the light is not speeding up or slowing down. You are seeing either the "bunching up" of light waves or the "thinning" of the waves, depending on which way the object is moving. Think about it this way too. When you see light of various colors around you, you aren't imagining the different colors coming at you at different velocities, right? They all travel at the speed of light.


What are synonyms for alarm?

fear, panic, anxiety, fright, apprehension, nervousness, consternation, danger signal, warning, bell, alert, siren, hooter, distress signal


Related questions

When you are driving and hear an ambulance siren?

yield to the emergency vehicle


You don't need to pull over for an emergency vehicle using its lights and siren if?

There is no need to pull over for an emergency vehicle using its lights and siren if you are already parked or idling on the side of the road.


It is against the law to follow within feet of any emergency vehicle which is answering an emergency call.?

Tailgating an emergency vehicle is silly, as not only will you be speeding (only the emergency is allowed to speed while showing blue lights, and siren), but the emergency vehicle may stop suddenly, so you may crash and find yourself in trouble.


It is against the law to follow within feet of any emergency vehicle which is answering an emergency call?

Tailgating an emergency vehicle is silly, as not only will you be speeding (only the emergency is allowed to speed while showing blue lights, and siren), but the emergency vehicle may stop suddenly, so you may crash and find yourself in trouble.


Is there a siren on the ambulance police carsand the little police looking thing?

Almost every emergency vehicle is equipped with a siren.


If you are driving and hear siren coming what should you do?

Figure out where the siren is coming from and get out of the way of the emergency vehicle by pulling over or moving out of the way.


It is against the law to follow within how many feet of any emergency vehicle using a siren and red light?

the correct answer is 300 ft the correct answer is 300 ft


If an emergency vehicle passes you in traffic just as it passes you the pitch of the siren changes. This is because?

frequency.


If you can see an emergency vehicle with flashing lights ahead?

Turn on your flashers to help the emergency vehicle. If the emergency vehicle is moving and has a siren running, pull over to the side of the road.


Why ambulance have serin?

Not just ambulances, but many other emergency and police vehicles have a warning siren and flashing lights too. The lights and siren is to warn other road users ahead that a vehicle is on an emergency call and needs to get to the emergency as quickly as possible.


When approaching or being approached by an emergency vehicle with its siren and or lights on?

all traffic, in either direction, must slow down, pull to the right of the road, and stop until the emergency vehicle passes


When approaching or being approached by an emergency vehicle with its siren and or light on?

all traffic, in either direction, must slow down, pull to the right of the road, and stop until the emergency vehicle passes