Question

A slide projector needs to create a 98-cm-high image of a 2.0-cm- tall slide. The screen is 300 cm from the slide. Assume the image is projected through a thin lens. To get that type of image, what type of lens do we need, and is the focal length positive or negative? > Converging, Positive Diverging, Negative Diverging, Positive Converging, Negative

Answer 1

Softh :- hi= 98cm ho= 2cm v- 300cm obvloskly the lens is magnifying Hence it has to be conver lens. → Hence A connex tens in which light says that enters it parallel to its axis converge at a single point on th opposite side. Hence lene is diverging lens. im = 1 h 98 300 u 300 u= 45 Acording to sign convention 300 49 using lens foomula -- a f 4.5) - 1 300 f=t6cm option is correct (onverging positive. # Hope This Help. Thanks.