Thefocallengthofeachlensis47cmtheobjectisalightbulb

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Unformatted text preview: ke a big telescope mirror How to make a big telescope mirror Melt it & spin it 52,000 lbs of borosilicate glass when filled Multiple Lenses Exercises Multiple Lenses Exercises Two converging lenses are set up as shown. The focal length of each lens is 47 cm. The object is a light bulb located 70 cm in front of the first lens. What is the nature of the image from the first lens alone? (A) R EAL UP R IG HT (B) R EAL INVER T ED PICTURES EQUATIONS 111 =− s′ f s s > f M =− s′ s s′ = s ’ > 0 M < 0 (C ) VIR T UAL UP R IG HT fs s− f Dra w R a ys a s a b o ve re a l im a g e inve rte d im a g e s 1 =7 0 cm f=4 7 cm BB (D) VIR T UAL INVER T ED Multip le Le ns e s Exe rc is e s Multip Two converging lenses are set up as shown. The focal length of each lens is 47 cm. The object is a light bulb located 70 cm in front of the first lens. Le ns s e p a ra tio n = 2 m What is the object distance s2 for lens 2? (A) s 1 = 7 0 c m f = 4 7 c m s 1 ’ = 1 .4 3 m BB s 2 = ­1 .4 3 m (B) s 2 = +1 .4 3 m (C ) s 2 = ­0 .5...
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