ocr: 1667 Returns tol his course ofstudies at Trinity College, Cambridge. 1669 Aged26, he becomes professor of mathematics. He givesa series oflectures on light. 1671 Shows his reflecting telescope to the Royal Society, the recently established British scientific society. The telescope 1S based - on a design developedin 1663 by the Scottish mathematician andastronomer James Gregory (1638-75), usig mirrors to reflect light (rather than lenses to refract light) to focus theimage. Reflection givesa clear image becausei it does not split light.
