Animated model of the reflecting telescope designed and built by the English scientist Isaac Newton in 1671-2. Unlike earlier telescopes, which used lenses to focus light, Newton's designs used a concave mirror to focus light, helping to prevent the splitting of colours seen with lenses. This telescope was the third built by Newton, and had a mirror some 5 centimetres in diameter. Newtonian telescopes remain popular, as a large mirror is cheaper and lighter to construct than a lens giving the same light-gathering and magnifying power. Newton used his telescope to observe the phases of Venus and the moons of Jupiter. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Power And Syred |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Länge: | 30 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |