Doppler Effect/ Red shift, Blue shift - Science test

What is redshift

When an object is moving away from us, the light from the object is known as redshift- appears redder- wavelength is on the longer side of the spectrum (red)

what is blue shift

When an object is moving toward us, the light from the object is known as blueshift- light becomes bluer- wavelength is on the shorter side of the spectrum (blue)

what is speed in a waves

the distance a wave travels in a given amount of time

what is frequency in a waves

the number of waves that pass a given point in one second

what is amplitude in a waves

the maximum displacement of points on a wave- line from the middle to measure how tall the waves are

What happens to a stars waves when moved closer to earth

Become shorter wavelegnths- appear at a shorter (bluer) wavelegnths

What happens to a stars waves when moved farther from earth

Become longer wavelengths- appear at a longer (reder) wavelength's

What is the doppler effect

the increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other

how does the doppler effect impact the frequency and wavelengths

If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases- and vice versa.

how do you tell if a emission spectra is in redshift or blueshift

If a star is traveling towards us, its light will appear blue shifted, and if it is traveling away the light will be redshifted. If its redshifted it will be on the higher end of the spectra- if its blue shifted it will be on the lower end of the spectra.