تسجيل الدخول

تسجيل

The Astronomical Telescope

المؤلف:  ESSENTIALS OF PHYSICS

المصدر:  GEORGE A. HOADLEY

الجزء والصفحة:  p-492

2025-12-23

452

The ordinary astronomical telescope (refracting) is much like the compound microscope in principle. But while both. lenses magnify in the microscope, owing to the nearness of the object to the object glass, the eyepiece alone magnifies in the telescope. This is due to the fact that the object is at a distance, and the image formed by the object glass is nearly at its principal focus and very small.