### RedShift: to speak what?

To talk around "redshift", let"s first explain what Doppler Effect is. Have you ever been watching website traffic as you was standing on the sidewalk and also listened come the happen cars together they whizzed by? Imagine the sound that a auto as it gyeongju by you. Vaaaaa (car coming toward you) rooooom (car relocating away native you)! Now allows examine that sound.
 brief wavelength higher frequency greater pitch long wavelength reduced frequency lower pitch
When a relocating object comes towards you, the sound tide it sends towards you room compressed, and also their wavelengths end up being shorter. As soon as the wavelength that the sound wave shortens, it has a higher frequency because an ext cycles of the wave deserve to go by in a provided interval that time. A greater frequency way a higher pitch, for this reason you most likely noticed the the sound that the vehicle is higher as that moves toward you than when it moves away. As the car drives away, however, just the the contrary happens. The wavelength that the sound tide becomes longer as the car moves away.

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A longer wavelength method that no as plenty of wave cycles have the right to pass in a given time interval, for this reason the frequency is lower, and also thus the key of the sound is much lower.

## Relating Doppler result to Light and also Redshift

You could be questioning yourself now, go this Doppler result stuff occupational with light waves? Yes, but in a slightly various way. Us cannot "listen" to a radiating object to phone call if the is relocating away, however we have the right to observe its radiation.
 an object that is a specific distance away from us is radiating light (represented through the green light wave) If the object starts towards us, the wavelength that the light it emits will get shorter, which means the light will certainly be an ext energetic and have a greater frequency (represented by the blue irradiate wave) vice versa, if the object starts to move away indigenous us, the wavelength of the irradiate it emits will come to be longer and also less energetic, and also have a lower frequency (represented by the red irradiate wave)
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