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A student wishes to use their knowledge of thin lenses to make a simple projector.She wants to create a 9 3 cm tall image from

A student wishes to use their knowledge of thin lenses to make a simple projector.She wants to create a

93

cm tall image from a

2.4

cm tall slide. If the screen is

3.06

maway from the slide, then what focal length lens must she purchase? Report youranswer in units of cm

.

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