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Doppler effect

by Lewis Carroll
written by Lewis Carroll

The Doppler effect is the change in oscillation frequency or wavelength perceived by an observer as a result of the movement of the wave source and the observer relative to each other. Usually, in optical astronomy, this relationship is denoted by a symbol or letter and is called “redshift” when the source is at a considerable distance from the observer, and “blue-shift” if the source is approaching.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

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