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REFLECTING TELESCOPE

Sir Isaac Newton's 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 15cm and could magnify 30-40 times. Inadequate mirrors meant that the Newtonian reflector was not as refined as contemporary refracting telescope, until 1722, when James Haley ground a quality parabolic mirror. This drawing was published in the philosophical transactions of the Royal Society in 1672.
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Title: REFLECTING TELESCOPE
Caption: Sir Isaac Newton's 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 15cm and could magnify 30-40 times. Inadequate mirrors meant that the Newtonian reflector was not as refined as contemporary refracting telescope, until 1722, when James Haley ground a quality parabolic mirror. This drawing was published in the philosophical transactions of the Royal Society in 1672.
Category: SCIENCE • people • TECHNOLOGY
Credit: Album / Science Source
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Image size: 2550 × 3787 px | 27.6 MB
Print size: 21.6 × 32.1 cm | 1003.9 × 1490.9 in (300 dpi)
Keywords: HISTORICAL • ISAAC NEWTON • NEWTON • NEWTONIAN TELESCOPE • PEOPLE • REFLECTING TELESCOPE • REFLECTING TELESCOPES • REFLECTOR TELESCOPE • SCI • SCIENCE AND TECHNOLOGY WISSENSCHAFT SCI • SCIENCE HISTORY • SCIENCE • SCIENCE-TECHNOLOGY • SCIENCE_AND_TECHNOLOGY WISSENSCHAFT SCI • TECHNOLOGY • TELESCOPE • TELESCOPES