phy140L refraction thin lens

# phy140L refraction thin lens - GUIDEQUESTIONS 1...

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Physics Laboratory Part 4 GUIDE QUESTIONS 1. In the experiment, is the image formed real or virtual? Justify your answer.   Real image is formed in the experiment, because convex lens produce real image while concave lens produce virtual image. It is a real image, because the image formed is behind the lens and is inverted. 2. Explain why object and image distance are interchangeable?   The object and image distance are interchangeable, because this gives rise to points of conjunction, a point on an object has a conjugate point on the image, both will yield the same value for f and it is a property of optical systems known as reversibility. 3. Enumerate the different cases of image formation using a convex lens. a.) Image is reduced and inverted if the object distance is greater than 2f. b.) Image is the same size as the object if the object distance is equal to 2f. c.) Image is enlarged and inverted if the object distance is between f and 2f.

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• Fall '13
• convex lens

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