A concave mirror collects light from a distant star. How far from the mirror is the image of the star if the radius of curvature is 150 cm?
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Expert's answer
2011-05-18T09:10:50-0400
As the distance from the star can be considered as infinite, the focal length is equal to R/2 = 1.50m/2 = 0.75 m, we can use the formula: 1/f = 1/d0 + 1/d1 = 1/∞ + 1/d1 -1/0.75 = 1/d1 d1 = - 0.75. The image is at 0.75m away from the mirror.
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