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an object of hight 10cm is kept at a distance of 30cm in front of concave mirror.the focal length of the mirror is 20cm at what distance from the mirror should a screen be kept so asto get Acker image ? what will be size and natural of the image? |
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Answer» We use the CURVED mirror formulae to get the image distance.: 1/f=1/v+1/U V is object distance and u is image distance. F is the focal LENGTH. Substituting the VALUES :1/15=1/25+1/u 1/u=1/15-1/25=5-3/75=2/75 U=75/2=37.5cm We use the object distance and the image distance to get the magnification. M=37.5/25=×1.5 The image SIZE =1.5×7=10.5cm The image is real. |
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