Optical Instruments347(b) With the image at the normal near point, the angular magnification is max25.0 cm25.0 cm117.144.07 cmmmf==+=+=+25.20(a) For maximum magnification, the image should be at the normal near point ( )25.0 cmq=−of the eye. Then, from the thin lens equation, ( )( )25.0 cm5.00 cm4.17 cm25.0 cm5.00 cmqfpqf−=+−−−(b) The magnification is 25.0 cm25.0 cm115.00 cmmf=+6.0025.21(a) From the thin lens equation, a real inverted image is formed at an image distance of ( )( )71.0 cm39.0 cm86.5 cm71.0 cm39.0 cmpfqpf=+so the lateral magnification produced by the lens is 86.5 cm1.2271.0 cmqhMhp′−=−=−and the magnitude is 1.22M=(b) If
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