Isaac Newtons design for a reflecting telescope
Framed Prints
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Framed Print of Isaac Newtons design for a reflecting telescope
Diagram of Sir Isaac Newtons design for a reflecting telescope. Known also as the Newtonian telescope. It worked by concentrating light by reflection from a parabolic mirror, instead of by refraction through a lens. Newton (1642-1727) first displayed this telescope to King Charles II, based on a design of 1668. It had a focal length of 15 cm and could magnify 30-40 times. Inadequate mirrors meant that the Newtonian reflector was not as refined as contemporary refracting telescopes, until 1722, when James Hadley ground a quality parabolic mirror. This drawing was published in the Philosophical Transactions of the Royal Society in 1672. Science Photo Library features Science and Medical images including photos and illustrations. © SCIENCE PHOTO LIBRARY
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Media ID 6451691
History Of Instrument Reflecting Telescope Telescope Telescopes
Modern 14"x12" (36x31cm)
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 19.3cm x 22.2cm (7.6" x 8.7")
Estimated Product Size is 31cm x 36cm (12.2" x 14.2")
