Pedestal Mirror

Pedestal Mirror
Pedestal Mirror

convex mirror question!?

bright areas of grass placed on pedestals are convex mirrors. An area with a diameter of 50.9 cm. A 12.0 cm robin sits on a tree of 1.83 m of the sphere. (A) Where is the image of the league? (Cm) b) How long is the image? (Cm) please help! What should I do?

(A) u = object distance, v = image distance, r = radius of curvature, h = Image height. Real positive sign convention. 1 / u + 1 / 2 = v / r For a convex mirror, r is negative -. r = 50.9 / 2 1 / 183 + 1 / v = 4 / (- 50.9) v = - cm. 11.8977 The image is 11.9cm behind the mirror to 3 sig. Fig. (B) Based on the league front of the mirror is 183 cm and the length is 12.0cm League instead 195cm in height behind the mirror. On the back of 1 / 195 + 1 / v = 4 / (- 50.9) v = - 11.9455cm cm. The difference between the two readings of the length v Image Size: 4.78 * 10 ^ (- 2). to 3 sig. Fig. If the height is 12.0cm, and h is the height of the image that is necessary: v = h * 12.0 / u = - 0.780 cm it results is negative, is that the height of the virtual image. is 0780 cm 3 sig. Fig.

do you think thin is beautiful?

admin posted at 2009-1-30 Category: Mirrors

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