When an object is placed 8 millimeters from a concavespherical mirror, a clear i

Question

When an object is placed 8 millimeters from a concavespherical mirror, a clear image can be projected on a screen 16millimeters in front of the mirror. If the object has a height of 4millimeters, the height of the image is. (a) 2millimeters                           (c) 8 millimeters (b) 4millimeters                            (d)12 millimeters When an object is placed 8 millimeters from a concavespherical mirror, a clear image can be projected on a screen 16millimeters in front of the mirror. If the object has a height of 4millimeters, the height of the image is. (a) 2millimeters                           (c) 8 millimeters (b) 4millimeters                            (d)12 millimeters

Explanation / Answer

The object is placed 8 millimeters from a concave sphericalmirror The clear image is projected on a screen 16 millimeters infront of the mirror. The height of the object is O = 4 millimeters Let the height of the image be I. We know from the relation (v/u) = (I/O) or I = (v/u) * O Here,v = 16 millimeters,u = 8 millimeters and O = 4millimeters or I = (16/8) * 4 = 8 millimeters Therefore,the height of the image is 8 millimeters.

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