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Poster of types of optical telescope: Newtonian, Refracting, and Casserian.
Telescopes Poster

Doppler Effect: light waves emitted from a moving star.

Doppler Effect: this animation shows how the apparent increase in frequency observed in light waves emitted from an approaching star (or conversely a decrease in frequency in light waves emitted from a receding star) happens. This causes a red shift for an observer watching the star recede (left of animation) and a blue shift for an observer watching the star approach (right of animation).



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PO Box 9150, Deakin, ACT 2600, Australia. Mobile phone Australia 0405 17 64 71
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