Question

A slide projector uses a thin lens with a focal length 132 mm to project a clear image on a screen located 10.5 m from the lens. Calculate the distance the slide is from the lens and the magnification obtained. O 513 mm, m = -20.5 O 134 mm, m = -78.4 154 mm, m -54.9 513 mm, m - 20.5 O 585 mm, m-17.9

Answer 1

of lens from tens ㅗ ㅗ I f Q. In slide projector genrally the convex lenses are used to focus the image given The focal length f = +132 mm = +0.132m distance of image di + 10.5m (soren from lens say at distance de the slide is place Gstra thin lens formela do d? ㅗ do fde 0.132) (10.5) de dorf 10.5-0.132 do 1.386 = 0.1337 in 0.134m 10.368 - 1m = 100 mm do = 134.0 mm (the sign of do implies that object is placed opposite side that of images The object (slide) is place at do 134.0 mm from tens The magnification is given by - di ta f 3 mo do m= -10.5 = -78.545 a-78.5 0.1337 The magnification is m= -78.5 (negative sign of m implies that image will be invested ) object (slide) die 1 . aa lens a do The comect option is do = 134 mm and m= -78.4 dinage