Inside Out Library
General and practical optics (1920)
Laurence, Lionel · London, School of Optics · leaf 186
lated, we obtain Fx=9-23 cm., E^-769 cm., E2=-615 cm., Tx=-616 cm.F2=8-26 cm., E1=-783 cm., E,2=-609 cm., T2=-608 cm. 174 GENERAL AND PRACTICAL OPTICS and for the combination 9-23 x 8-26 76-2398 F= 9-23+ 8-26-2-5 E= 9-23x2-5 1523-075 E: )-23 +8-26-2-5 158-26x2-5 20-65 =508 cm.=1-538 cm.=1-377 cm.… … Fig. 195. Example with a Convex and a Concave Lens.—Let F1= + 12 in.; F2=-10 in.; d=b in.; Tx=-5 in.; T2=-2 in.; then combined we obtain (Fig. 195) „ +12x(-10) -120 F= -= =+40 in. + 12-10-5 -3 E=12 x 5/ - 3== - 20 in. E== - 10 x 5/ - 3=16-66 in. T=5 + -5 + -2 - ( - 20 +16-66)=9-03 in. or T=-5 + -2…Optics
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