How to differentiate between a Reflecting and Refracting Telescope?
(A) A Reflecting Telescope is also called as catoptric Telescope. A concave parabolic primary mirror is employed by the reflecting Telescope for collecting and focussing light onto a flat secondary mirror. The secondary mirror then reflects the image into an opening located at the side of the telescope and finally into the eyepiece assembly. On the other hand a Refracting Telescope also known by the name of Dioptric Telescope features a long thin tube. It is through this tube that the light passes in a straight line. The path followed by the light is from the front objective lens to the eyepiece located on the opposite end of the tube. (Q) What do the numbers 7x 35, 7x 50, 10x 50, etc. Indicate on Binoculars (A) The numbers that are seen on binoculars basically designate the magnification as well as objective lens size. To give an illustration, a reading of 7 x 35 in a binocular indicates that the binoculars will be able to magnify the image seven times, while 35 mm is the diameter of
