due to concave lens,an image on half of the night of object so what is it's magnification
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Explanation:
magnification means to zoom or to look closely
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The greater effect a lens has on light rays, the more powerful it is said to be. For example, a powerful converging lens will focus parallel light rays closer to itself and will have a smaller focal length than a weak lens. The light will also focus into a smaller and more intense spot for a more powerful lens. The power P of a lens is defined to be the inverse of its focal length. In equation form, this is P=1/f
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