A slide projector needs to create a 98-cm-high image of a 2…
A slide projector needs to create a 98-cm-high image of a 2.0-cm-tall slide. The screen is [d] cm from the slide (it is the object to image distance). What focal length does the lens need (unit in cm)? Assume that it is a thin lens. [Hint: is the image real or virtual?]
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