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A 5cm tall object is placed 40cm away from a concave mirror of focal length 50cm. Find position of the image. Draw a ray diagram for the above set up |
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Answer» distance from the mirror, u = -40cm FOCAL length of concave mirror , f = -50cmuse formula, 1/v + 1/u = 1/f or, 1/v + 1/-40 = 1/-50 or, 1/v = 1/-50 + 1/40 or, 1/v = (-4 + 5)/200 = 1/200 v = 200cmhence, position of IMAGE from the pole of mirror is 200CM . we know, magnification = -v/uheight of image/height of object = -v/u height of image/4cm = -200cm/-40cm height of image/4cm = 5height of image = 20cm |
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