13_Chapter 23 HomeworkCH23 Mirrors and Lenses

13_Chapter 23 HomeworkCH23 Mirrors and Lenses - Mirrors and...

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Mirrors and Lenses 279 (b) The ball and its image coincide when 0 p = and when 1122 ppp +== R , or 1.00 pR m = = From 2 0 1 2 yy yvt a t ∆= + , with 0 0 y v = , the times for the ball to fall from to these positions are found to be 3.00 m p = () 2 2 . 0 0 m 0.639 s = 22 9.80 y y a ∆− == s m t and 2 23 . 0 0 m 0.782 9.80 m s t s 23.21 From 122 nn 1 p qR += , with R , the image position is found to be 50.0 cm 2 1 1.00 38.2 cm 1.309 n qp n  =−   or the virtual image is 38.2 c the upper surface of the ice m below 23.22 For a plane refracting surface
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