The bevel of the window made the light refract into a rainbow.
A lens transparent object that forms an image by refracting ,or bending light
transparency
glass, wire, and some tools
He used the sucker to get the air out of the light bulb and the rest I don't no.
No.
water is one
because at this magnification the light diffraction in air is to important to have enough light reach the lens, so oil should be in the contact between the slide and the lens because it has a much lower refraction index than air allowing more light to reach the lens
The bevel of the window made the light refract into a rainbow.
Refractors use a concave lens to refract the light rays through the main body, off the rectangular prism and into the eyepiece. These telescopes use no mirrors like reflectors (except the triangular prism contains a small mirror but a triangular prism is optional)
A convex lens will scatter outbound light and focus inbound light.
Many telescopes do, especially the largest ones.Others use a refracting lens to do that job.(Note: Our entire discussion so far has included a redundant amountof redundancy. All mirrors reflect, and alllenses refract.)
A lens is a curved piece of glass or other transparent substance that is used to refract light.
Focusing or dispersing light.
Concave
a prism or convex lens
A convex lens will scatter outbound light and focus inbound light.