how light diverging in concave lens?
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Figure 3 shows a concave lens and the effect it has on rays of light that enter it parallel to its axis (the path taken by ray 2 in the Figure is the axis of the lens). The concave lens is a diverging lens, because it causes the light rays to bend away (diverge) from its axis.
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Light Rays Entering a converging lens psrallel to its axis criss one another at a single point on the opposite side. for a converging lens , the focal point is the point at which converging light rays cross ; for a diverging lens , the focal point is the point from which diverging light rays appear to originate.
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