Question

A certain LCD projector contains a single thin lens. An object 23.2 mm high is to...

A certain LCD projector contains a single thin lens. An object 23.2 mm high is to be projected so that its image fills a screen 1.84 m high. The object-to-screen distance is 3.09 m.

(a) Determine the focal length of the projection lens.=____ mm

(b) How far from the object should the lens of the projector be placed to form the image on the screen?=___ mm


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Answer #1

V + U = 309 cm

Magnification = 184 / 2.32 = V / U

184 / 2.32 = V / 309

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