Wh a tis th e s m a lle s tn u m b e ro n th e rule

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Unformatted text preview: water/air interface • Diver’s illusion 97º Diver sees all of horizon refracted into a 97°cone θ1 = 90 n1 n1 1 sin θ 2 = sin 90 = = n2 n2 1.33 θ 2 = 48.5 Exercise A m e te r s tic k lie s a t th e b o tto m o f a re c ta ng ula r wa te r ta n k o f h e ig h t 5 0 c m . Y o u lo o k into th e ta n k a t a n a n g le o f 4 5 o re la tive to ve rtic a l a lo n g a lin e th a t s kim s th e to p e d g e o f th e ta nk. Wh a t is th e s m a lle s t n u m b e r o n th e rule r th a t yo u c a n s e e ? 45o n water = 1 .3 3 5 0 c m 0 Conceptual Analysis: ­ Lig h t is re fra c te d a t th e s urfa c e o f th e wa te r Strategy: ­ De te rm ine th e a ng le o f re fra c tio n in th e wa te r a nd e xtra p o la te th is to th e b o tto m o f th e ta nk. 20 40 60 80 100 Exercise 45o A meter stick lies at the bottom of a rectangular water tank of height 50cm. You look into the tank at an angle of 45o relative to vertical along a line that skims the top edge of the tank. nwater = 1.33 50 cm...
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