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11_Chapter 25 HomeworkCH25 Optical Instruments

# 11_Chapter 25 HomeworkCH25 Optical Instruments - Optical...

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Optical Instruments 347 (b) With the image at the normal near point, the angular magnification is max 25.0 cm 25.0 cm 1 1 7.14 4.07 cm m m f = = + = + = + 25.20 (a) For maximum magnification, the image should be at the normal near point ( ) 25.0 cm q = − of the eye. Then, from the thin lens equation, ( ) ( ) 25.0 cm 5.00 cm 4.17 cm 25.0 cm 5.00 cm qf p q f = = = + (b) The magnification is 25.0 cm 25.0 cm 1 1 5.00 cm m f = + = + = + 6.00 25.21 (a) From the thin lens equation, a real inverted image is formed at an image distance of ( )( ) 71.0 cm 39.0 cm 86.5 cm 71.0 cm 39.0 cm pf q p f = = = + so the lateral magnification produced by the lens is 86.5 cm 1.22 71.0 cm q h M h p = = − = − = − and the magnitude is 1.22
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