Refraction In Physics

What is refraction
Refraction is the bending of light when it passes from one medium to another, as light travels through one medium such as air it will travel at a certain velocity but once it enters another medium such as glass it will change direction due to the increase in density of the medium which slows down the velocity of the light. The amount that the light bends as it travels through a medium depends on how drastic the difference in optical density is. For example if light were to travel from air to glass the angle of refraction would be higher than if the light were to travel through water

Here from the left diagram we can see that as the incident ray travels from air into a denser medium the refracted ray will refract towards …show more content…
When light from an object enters the objective lens the lens will gather the light and refract it near the back of the telescope where the light rays will converge to a point (The focal point) the point of using a convex lens instead of a concave lens is due to convex lenses being able to converge light this diminishes the size of the image so that the light can fit into the eyepiece and due to the light rays continuing to travel past the focal point any image viewed past the focal point results in the image being seen flipped upside down after travelling past the focal the point the rays will enter the eyepiece the job of the eyepiece is to magnify the image while also bringing the image to the size of your pupil. Something interesting about refractor telescopes is that the light in the space between the two lenses is a real image but once the light passes through the eyepiece the image becomes a magnified virtual image this could be due to how the objective lens is a convex lens which creates real images but due to the eyepiece being a concave lens once the light passes through it the image appears magnified and is