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In which formula (lens and mirror) the magnification is in negative sign |
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Answer» Lens formula is given by:\xa01/v - 1/u = 1/fwhere :\tu – image distance\tv – object distance\tf – focal lengthMagnification: The ratio of the height of the image and the height of the object. It is represented by the letter m.m = height of image/height of object = h\'/h = v/u\t\xa0The positive sign shows that the image is erect and virtual.\tThe negative sign shows that the image is inverted and real. In the Gaussian form of the lens equation, a negative sign is used on the linear magnification equation as a reminder that all real images are inverted. If the image is virtual, the image distance will be negative, and the magnification will therefore be positive for the erect image. |
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