p35_014 - 14. We remark that the sign convention for r (for...

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14. We remark that the sign convention for r (for these refracting surfaces) is the opposite of what was used for mirrors. This point is discussed in § 35-5. (a) We use Eq. 35-8: i = n 2 µ n 2 n 1 r n 1 p 1 =1 . 5 µ 1 . 5 1 . 0 30 cm 1 . 0 10 cm 1 = 18 cm . The image is virtual and upright. The ray diagram would be similar to Fig. 35-10(c) in the textbook. (b) We manipulate Eq. 35-8 to ±nd r : r =( n 2 n 1 ) µ n 1 p + n 2 i 1 =(1 . 5 1 . 0) µ 1 . 0 10 + 1 . 5 13 1 = 32 . 5cm which should be rounded to two signi±cant ±gures. The image is virtual and upright. The ray diagram would be similar to Fig. 35-10(e) in the textbook, but with the object and the image placed closer to the surface. (c) We manipulate Eq. 35-8 to ±nd p : p = n 1 n 2 n 1 r n 2 i = 1 . 0 1 . 5 1 . 0 30 1 . 5 600 =71cm . The image is real and inverted. The ray diagram would be similar to Fig. 35-10(a) in the textbook. (d) We manipulate Eq. 35-8 to separate the indices:
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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