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Microscopes and Telescopes - Graphic Organizer

By: Dhanak Aziz

Microscopes and Telescopes

Microscopes

A microscope is an instrument that is used to see objects that are too small for the human eye to see. A typical compound microscope has at least 2 lenses- the first lens produces a magnified and inverted image, and the second lens delivers an upright and magnified image of the object. Light will pass through the object, which the first lens uses to produce a real, inverted, and magnified image of the object. This image acts as the object for the second lens, or the eyepiece, which is placed so that the image is closer to it than its focal length. The eye piece acts as a magnifying glass. Compound microscopes and simple microscopes are comprised of convex lenses. A microscope will generate a magnified real image.

Microscopes

Telescopes

A telescope is an optical instrument that is used to make distant objects appear magnified. Telescopes are comprised of 2 lenses- a convex lens and a concave eye piece, or they can be comprised of a convex lens and a convex eyepiece. The convex lens will focus the distant image and the concave/convex eye piece will magnify the image. The convex lens will refract light rays to a focal point and the convex/concave eye piece spreads the rays at the focal point to magnify the image. The eye piece creates a virtual inverted image that is magnified.

Telescopes

Difference Between Microscopes and Telescopes

Telescopes typically view larger images so the first convex lens will produce a smaller version of the actual image. Also, the difference in focal lengths is crucial for the production of the image- the convex lens in a telescope produces long focal lengths but the convex lens in a microscope prodces a short focal length. Additonally, the lens diameter determines the amount of light that will be absorbed, so the lens diameter of a telescope is larger because it needs to absorb as much light as possible from the object. However, because a microscope uses artifical light, the lenses have smaller diameters.

Similarities Between Telescopes and Microscopes

Microscopes and telescopes are both used to magnify and observe objects. Both utilize convex and concave lenses to refract light to create images of an object

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