Finding out the focal length of the projection lens
A certain LCD projector includes a single thin lens. An object of 24.2 mm high is to be projected so that its image fills the screen 1.78 m high. The object-to-screen distance is 2.94 m.
(i) Find out the focal length of the projection lens.
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A certain LCD projector includes a single thin lens. An object of 24.2 mm high is to be projected so that its image fills the screen 1.78 m high. The object-to-screen distance is 2.94 m. (i) Find out the focal length of the projection lens.
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