Question

One of the lenses on our lab bench has a focal length of 48mm. If the object you are trying to project is 60mm from the lens and the screen you are projecting onto has a sharp, focused image, how far away from the lens is the screen? If the object is 20mm high, how big will the projected image be?

Answer 1

Image height is negative means image will form in reverse at a distance of 240 mm from the lenses.

40mm focal length is equal to f = ove, 6= 48mm i Conven unse The object distance is comm . u=-60mm from lense formula, ► } - Ý + +- to - 60-48 48x60 48x6os - 40x5=2402 mm Image height object height h = ¥xxh = 240 x 20 mm ń - - domm - 60