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Bộ tài liệu bài tập tham khảo môn vật lý bậc đại học bằng tiếng anh Chapter 34 | 34.1 If up is the t y -direction and right is the t x -direction then the object is at -x0 - y0 P2 is at x0 - y0 and mirror 1 flips the y -values so the image is at X0 y0 which is P3 . 34.2 Using similar triangles - d -- A_ d - 0.040 m28.0m t0.350 m - 3.24 m. mirror mirror mirror 0.350 m 34.3 A plane mirror does not change the height of the object in the image nor does the distance from the mirror change. So the image is 39.2 cm to the right of the mirror and its height is 4.85 cm. R 34.0 cm 34.4 a f --------- 17.0 cm. 2 2 b If the spherical mirror is immersed in water its focal length is unchanged it just depends upon the physical geometry of the mirror. 34.5 a mirror. y s y s - 0.600 cm 33.0cm 16.5 cm -1.20 cm and the image is inverted and real. 34.6 a b 1111 2 1 I _ _--- s s f s 22.0 cm 16.5 cm s _ -6.60 cm to the right of the mirror. y _ -y _ - 0.600 cm cm _ 0.240 cm and the image is upright and s 16.5 cm virtual. 34.7 11111 1 --1--_ _-----------------77- s s f s 1.75 m 5.58 x 1010m s -1.75 m. m _- ----- _ 3.14 x 10 11 y _ my 5.58 x 1010 _ 3.14 x 10-11 6794 x 103 m _ 2.13 x 10-4 m. 34.8 R _ -3.00 cmj- _ _--------------------------- s _ -1.40 cm in the s s f s 3.00 cm 21.0 cm ball . The magnification is m _ -1.40 cm 21.0 cm _ 0.0667. s s . 1 1 1 1 11 s - f sf s f 34.9 a ---------- ------ s ------.Also m ---- . s s f s f s fs s - f s f - s b For f 0 s f s 0 so the image is always on the outgoing side and is real. The magnification is m f 0 since f s. f - s c For s 2 f m f - f 1 which means the image is always smaller and inverted since the magnification is negative. For f s 2 f 0 s - f f m f 1. f d Concave mirror 0 s f s 0 and we have a virtual image to the right iif. of the mirror. m f 1 so the image is upright and larger than the object. 34.10 For a convex mirror f 0 s sf s - f ----hj-C- 0. Therefore the image is s 1 fl always virtual. Also m ------- f - s - f - s 0 so the image is erect and m 1 since f s f so the image is .
