9th Science II, 18th Chap. Observing space: Telescopes ЁЯФн 2. To join our Whats App group рдорд╣िрддी рд╡िрдЬ्рдЮाрдиाрдЪीЁЯО╖ please touch the blue wordsЁЯСЗ ЁЯСЙ рдоाрд╣िрддी рд╡िрдЬ्рдЮाрдиाрдЪी ЁЯО╖ ЁЯеБ The reflecting telescope : A)The Newtonian telescope: The reflecting telescopes are mainly of two types : Newtonian and Cassegrain. It is a type of reflecting telescope that uses a concave primary mirror and a flat diagonal secondary mirror. Light rays coming from space are reflected by the concave mirror. Before these reflected rays converge at the focus, they are deflected again by a small plane mirror. As a result, they get focused at a point lying on the perpendicular to the axis of the telescope’s cylinder. They pass through the eyepiece and we get a magnified image of the source. (⭐converge: come together, meet, join, combine, gather) ЁЯОК The Cassegrain telescope : The construction of a Cassegrain type of telescope is shown below ЁЯСЗ It is a combination of a primary concave mirror and a secondary con...