A projector must display a 35 mm slide onto a screen that is 4.0 m from the slide
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A projector must display a 35 mm slide onto a screen that is 4.0 m from the slide. The projector lens has a focal length of 25 cm. Assuming the lens must be closer to the slide than to the screen, how far from the slide should the lens be placed so that the projected image is sharp?
(a) 25cm
(b) 27cm
(c) 100cm
(d) 374cm