Are you interested in purchasing the entire website? If so, we will include an additional premium domain (freetimelearn.com) at no extra cost along with this domain.
Mail : freetimelearn@gmail.com
WhatsApp : +919966463846
Correct Answer : Star tracker
Explanation : The star sensors have a narrow field of view and maintain a centered star image through the gimbal drive commands and are called star trackers. They have day and night tracking capability, given reasonable cloud cover conditions.
Correct Answer : Option (D) : Optical transmission losses
Explanation : For anti-reflection coated optics, the optical transmission losses may be 1% or 2% at each air to glass or glass to air optical control surface within the telescope, including windows or sensor covers or surfaces. For uncoated optics, the loss per surface is about 4% to 5%.
Correct Answer : Option (B) : f/ number
Explanation : The ratio of focal length to aperture is called the f/ number. For example, an f/10 telescope may have a 30 in. focal length and a 3 in. aperture.
Correct Answer : Option (C) : Angular size of image
