Question

A doctor examines a mole with a 16.5 cm focal length magnifying glass held 11.4 cm from the mole. (a) How far is the image from the lens? -0.37 x cm Is the image real or virtual? Oreal virtual (b) What is its magnification? 10 (c) How big is the image of a 5.00 mm diameter mole? 50 X mm

Answer 1

p! 4 f and is an As the magnifying glass is Convex lens Object placed inside the focal length so it formed an image on same side of og object and a virtual image. from lens formula, - 4 = ㅗ f here, u = -11.4 cm (for convex lens) of + 1615 cm L ㅗ 11.4 다 u tff = Tos V :VE - 36.88 cm Image distance from Lens = -36.88 cm (H or you can write 36.88 cm sign is negative so it is an virtual image

Magnification > ma u -36.88 E 3:24 I. f, h = 5mm diameter of the mole then after magmification mole diameter, h = mxh 5 X 3.24 mm 216.18