Physics, 02.01.2021 14:00 yurybell

7. A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12cm from P. At what point does the beam converges if the lens is a) a convex lens of
focal length 20cm and b) a concave lens of focal length 16cm.

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7. A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam...