WORLD HISTORY

Detailed explanation-1: -Telescope: It is a device used to see distant objects. The simple telescope consists of two lenses, an objective lens, and an eyepiece. The objective lens captures the image from a distant object and focuses it on the focus of the second lens eyepiece.

Detailed explanation-2: -A refracting telescope works just like a magnifying glass. It uses a convex glass lens (to bend light and bring it into focus. This lens is thicker in the center than it is toward its edges, which bends the light more at the edge of the lens than light coming through the center.

Detailed explanation-3: -binoculars, optical instrument, usually handheld, for providing a magnified stereoscopic view of distant objects.

Detailed explanation-4: -In a REFRACTING TELESCOPE, light from a distant object is collected and focused by a convex lens called the OBJECTIVE LENS. A second lens, called the EYEPIECE LENS, works as a magnifying glass to enlarge the image.

Detailed explanation-5: -A Barlow lens is a concave lens that when placed in a telescopes before the eyepiece, it will increase the focal length of the telescope by 2x, 3x, 4x and so on, depending on the size you use. The most common Barlow is the 2x Barlow and normally come supplied with most beginner telescopes.