Essay On Telescope

Telescopes are optical devices used by people to magnify distant objects. There are two types of telescopes, terrestrial and astronomical. Terrestrial telescopes are used for by people on land to see objects in the far distance, and astronomical telescopes are used by astronomers to see stars. In this report, I will be discussing the refracting telescope, a type of astronomical telescope. Refracting telescope’s three main functions are to collect more light from the Diagram than a human eye can, to resolve the Diagram in a higher detail and to magnify the Diagram so it appears larger to the human eye.

The Behaviour of Light Passing Through Different Media

Waves are oscillations that transfer energy from one place to another. Light rays, which can be used to transport light into an eye, are transverse waves. This means the oscillate at 90 degrees to the direction of motion, in constant pulses of crests and troughs (high points and low points). Waves can also be longitudinal, which oscillate in the direction of motion by the particles forming

Convex lenses use refraction to converge light rays to a focal point, and convex lenses use refraction to diverge rays to a virtual point. Refractor telescopes are made from two types of lenses: the objective and the eyepiece. These lenses are both convex. Convex lenses have thicker glass in the middle of the lens than the outer edges. When parallel rays are shone through the lens, they converge to a point. This is due to when rays at the top hits the lens, they refract downwards towards the normal, and when they leave the lens, they refract away from the normal, downwards again. When rays at the bottom hit the lens, they refract towards the normal, upwards. When they leave the lens, they refract away from the normal, upwards again. These rays eventually converge at the focal point. The length between the focal point and the lens is the focal