When an object moves away from us, the light is shifted<span> to the </span>red<span> end of the spectrum, as its </span>wavelengths<span> get longer.
If an object moves closer, the light moves to the </span>blue<span> end of the spectrum, as its </span>wavelengths<span> get shorter Hope that helps have a wonderful day !</span>
The frequency and the wavelength of the wave have an inverse relationship.
The difference between a red shift and a blue shift is as follows;
Red shift: In the red shift, light changes as the object in space (such as star or galaxies) moves away from us then the light is shifted to red end.The light is shifted to a shorter frequency. In this case, the light is shifted to a longer wavelength.
Blue shift: In the blue shift, light changes as the object in space (such as star or galaxies) moves towards from us then the light is shifted to blue end. The light is shifted to a longer frequency. In this case, the light is shifted to a shorter wavelength.
Darwin first major break through was finding natural selection by using the pea pod method and noticing how some were yellow and some were green with different textures.
