ing Telescopes. .Two forms of re-flecting telescopes are shewn in figs. 113 and 114. In bothan image is formed by a concave mirror and magnified by aconvex eyepiece. The eyepiece has to be arranged in such amanner that the observers head when looking through it doesnot intercept any of the incident… … Fig. 113. This mirror is inclined at 45° to the axis of the large mirror. Parallel rays from a point P at a considerable distance arereflected by the concave mirror to form an image p at itsprincipal focus. Before reaching p they fall on the plane mirrorand are reflected by it to form a real image…
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