Concept explainers
The selection of converging lens for camera or projector or objective of microscope or telescope, but the selection of either the converging or diverging lens for the eyepiece.
Answer to Problem 1CQ
The camera or projector or objective of microscope or telescope needs real image obtained by converging lens whereas the eyepiece only needs virtual image which can be obtained by converging or diverging lens.
Explanation of Solution
The real image of the real object is needed for the camera and the slide projector. This is only obtained using a converging lens. The objective lens in a microscope or telescope also needs real image obtained only using converging lens. The eyepiece needs virtual image for the ease of viewing. This can be fulfilled by using either converging or diverging lens.
Therefore, the camera or projector or objective of microscope or telescope needs real image obtained by converging lens whereas the eyepiece only needs virtual image which can be obtained by converging or diverging lens.
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