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If in the previous example, we use a diverging lens with a focal length `10.0cm` to form an image of the pencile kept 15 cm in front of the lens, locate and characterize the image. |
Answer» In accordance with cartesian sign convention, the given parameters are `f=-10cm, u=-15cm` From lens equation, we have `=(1)/(v)-(1)/(f)+(1)/(u)` ` =(1)/((-10))+(1)/((-15))=-(1)/(6),v=-6cm` Lateral magnification `m=(v)/(u)=(-6)/(-15)=0.40` The minus sign with image shows that the image is located on the side of the object. The magnification is positive and `m lt 1` , which shows that the image is upright and diminished. |
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