Changes

[[Image:lighterstill.jpg]]

[[Image:lighterstill.jpg]]

[[Image:Bang1.jpg]]

[[Image:Bang1.jpg|right]]

Red Shift: Waves of light or sound are stretched out or compressed by motion:

Red Shift: Waves of light or sound are stretched out or compressed by motion:

Stretching a wave makes the wavelength longer; in the case of sound, it makes the note deeper; for light, it shifts the wavelength toward the red end of the spectrum.

Stretching a wave makes the wavelength longer; in the case of sound, it makes the note deeper; for light, it shifts the wavelength toward the red end of the spectrum.