1. Single convex lenses can be used to make images of far away objects. Will the
ID: 1516570 • Letter: 1
Question
1. Single convex lenses can be used to make images of far away objects. Will these images be real or imaginary? Where does the image occur relative to the focus? (Specify which side of the lens)
2. Lenses in combination are used in the making of microscopes and telescopes. When observing with the human eye, should the device create real or virtual images? Why?
3. Microscopes often have very bright lights to illuminate the object. If you were to look at the light without the microscope it appears so bright it may "hurt" to look at it. If the microscope magnifies the object to create a larger image, why is it safe to look through microscope at the very bright object? (This is the same concept as why projector bulbs are very bright.)
Explanation / Answer
1) These images will be real . The image occur very close to focus on the right side of lens (other than the side of the object ) .
2) When observing with the human eye, the device create virtual images .
A basic refracting telescope is an optical instrument that has two optical elements, an objective and an eyepiece. It has two thin lenses in air. The objective is a large lens that collects light from a distant object and creates an image in the focal plane, which is a representation of the object.
A compound microscope uses a simple combination of two converging lenses to produce a very effective magnifier. The lens closest to the object is known as the objective, and the second lens is the eyepiece. The object is placed between fo and 2fo. An intermediate image is formed by the objective lens near the object focal plane of the eyepiece.
3) Since the light reflect a few times the intensity decreases therefore it would not have any effects . So, it is safe to look through microscope at the very bright object .
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