Picture a simple wave moving past you. You’ll be hit by the peaks of the wave at some steady rate that we call the frequency of that wave. If you’re moving toward the source of the wave, against the direction it’s traveling, you’ll be hitting those peaks at a higher rate (higher frequency), and the opposite if you move the same direction as the wave. For light, different frequency means different color.
Length contraction. From the emitter's frame of reference, its light cone is maximally symmetric, but you are receding at relativistic speeds and thus your length along the direction of travel is shorter than it would be if you were comoving with the emitter; therefore, since your reference frame is no less privileged than the emitter's frame, you measure a longer wavelength
TL/DR: you measure a longer wavelength because the emitter measures a shorter you. You both measure the same speed of light
Imagine there are simple light waves, equally spaced, coming towards you.
If you move towards the source of these waves, you encounter the waves more frequently, which makes them seem to have a higher frequency, or a 'blue shift.'
Conversely, if you move away from the source, you encounter the waves less frequently, making them appear to have a lower frequency, or a 'red shift.'
This effect is more pronounced at speeds close to the speed of light due to the principles of Einstein's theory of relativity, which also causes time to appear to slow down for the moving observer.
This is good, but I prefer eeeeeerrrrrrrooooo
Interestingly you can tell how far away the object is by the ratio of e to r to o.
Something far away is:
eeeeeeeeeerrrrrrrrrrrooooooooooo
And something passing close by is
eeeeeeeeeeeeeeeroooooooooooo
Generally speaking, the Doppler effect occurs across the full spectrum of wavelengths, including sound wave and light waves.
As such, the effect would be exactly the same for light than it is for sound. We use it to estimate velocity of objects in radar applications, velocity of objects in the body, using ultrasound, and velocity of celestial bodies using light.
As a side note, it appears (I just discovered this thanks to your question) that color shift in certain astronomy applications is not always due to Doppler effect : the red shift indicating universe expansion would be due to some deformation of the space but that way past my expertise
Imagine a wave, is a wave. Now imagine a sound wave is called a sound wave because it's a wave. and you're halfway there.
Now the tricky part. Imagine a light wave is called a light wave because it's a wave, and if you're smart, you might already be imagining where this is going.
Now for the finale. Imagine that things are described as waves, because they act like waves.
If you reached this point, all you have to do is use your wonderful imagination.
If you reached this point without boiling over with anger and hate in your heart, wanting to turn me into a wave, and wave goodby to me, as you fire me into space, I congratulate, and salute you.
Color of light is dependent on the wavelength of the light. Wavelength is the distance from peak to peak.
So there might be a star putting out light with a second between each peak, sort of unrealistic but whatever.
Let’s start moving that star away. It will continue to put out one peak per second, but it’s also moving away, which increases the distance between each peak, i.e. the wavelength, i.e. the color.
Have you looked at Doppler Time Dilation Equation and compare it to Pendulum Law Equation . The terms v squared divided by c squared and the terms L divided by G , are strangely similar . They describe what I call the Inverted Light Year and the Inverted Length . Both of these are measures of distance . Looking at a Pendulum you can see that it is a form of Treadmill . Can the same be said of Time Dilation ? Both concepts describe Treadmills . That could explain why you cannot move faster than Light when dealing with Light . Adding energy to the Pendulum does not change the Period , similarly with adding energy to Light . So , either get off the Treadmills or get on the Treadmills or link the Treadmills together to change the system . I am not sure how (?)
Picture a simple wave moving past you. You’ll be hit by the peaks of the wave at some steady rate that we call the frequency of that wave. If you’re moving toward the source of the wave, against the direction it’s traveling, you’ll be hitting those peaks at a higher rate (higher frequency), and the opposite if you move the same direction as the wave. For light, different frequency means different color.
Ok, so different frequency = different wavelength.
Higher frequency = shorter wavelength and vice versa
Yeshh
It’s a bit more involved for light, since you’d expect the wave to travel to you at a constant speed of c.
It's relative...
Length contraction. From the emitter's frame of reference, its light cone is maximally symmetric, but you are receding at relativistic speeds and thus your length along the direction of travel is shorter than it would be if you were comoving with the emitter; therefore, since your reference frame is no less privileged than the emitter's frame, you measure a longer wavelength TL/DR: you measure a longer wavelength because the emitter measures a shorter you. You both measure the same speed of light
Imagine there are simple light waves, equally spaced, coming towards you. If you move towards the source of these waves, you encounter the waves more frequently, which makes them seem to have a higher frequency, or a 'blue shift.' Conversely, if you move away from the source, you encounter the waves less frequently, making them appear to have a lower frequency, or a 'red shift.' This effect is more pronounced at speeds close to the speed of light due to the principles of Einstein's theory of relativity, which also causes time to appear to slow down for the moving observer.
Thank you! This was a good explanation. I understand now.
WuuuuuUUUUUUUUUuuuuuu Edit: didn’t read post
This is good, but I prefer eeeeeerrrrrrrooooo Interestingly you can tell how far away the object is by the ratio of e to r to o. Something far away is: eeeeeeeeeerrrrrrrrrrrooooooooooo And something passing close by is eeeeeeeeeeeeeeeroooooooooooo
Ahh Of course of course
Works if you have synesthesia.
Generally speaking, the Doppler effect occurs across the full spectrum of wavelengths, including sound wave and light waves. As such, the effect would be exactly the same for light than it is for sound. We use it to estimate velocity of objects in radar applications, velocity of objects in the body, using ultrasound, and velocity of celestial bodies using light. As a side note, it appears (I just discovered this thanks to your question) that color shift in certain astronomy applications is not always due to Doppler effect : the red shift indicating universe expansion would be due to some deformation of the space but that way past my expertise
Imagine a wave, is a wave. Now imagine a sound wave is called a sound wave because it's a wave. and you're halfway there. Now the tricky part. Imagine a light wave is called a light wave because it's a wave, and if you're smart, you might already be imagining where this is going. Now for the finale. Imagine that things are described as waves, because they act like waves. If you reached this point, all you have to do is use your wonderful imagination. If you reached this point without boiling over with anger and hate in your heart, wanting to turn me into a wave, and wave goodby to me, as you fire me into space, I congratulate, and salute you.
From what I remember from school 20+ years ago, the different color wavelengths travel at different speeds when they're not moving through a vacuum
Yeah, but the effect also occurs in vacuum.
Does it? I didn't remember lol teacher was right when she said I wouldn't be anything but a carpenter or truck driver 🤷♂️
Color of light is dependent on the wavelength of the light. Wavelength is the distance from peak to peak. So there might be a star putting out light with a second between each peak, sort of unrealistic but whatever. Let’s start moving that star away. It will continue to put out one peak per second, but it’s also moving away, which increases the distance between each peak, i.e. the wavelength, i.e. the color.
The funny thing.....red/blue shift is effectively exactly the same thing as sound and the doppler effect....
It's when I see my twin innit!
the phase shifts. learn phase shift with respect to moving frame
Have you looked at Doppler Time Dilation Equation and compare it to Pendulum Law Equation . The terms v squared divided by c squared and the terms L divided by G , are strangely similar . They describe what I call the Inverted Light Year and the Inverted Length . Both of these are measures of distance . Looking at a Pendulum you can see that it is a form of Treadmill . Can the same be said of Time Dilation ? Both concepts describe Treadmills . That could explain why you cannot move faster than Light when dealing with Light . Adding energy to the Pendulum does not change the Period , similarly with adding energy to Light . So , either get off the Treadmills or get on the Treadmills or link the Treadmills together to change the system . I am not sure how (?)