A beam of light converges to a point P , A lens is placed in the path of the convergent beams 12 cm from P. At what point does the beam converge if the lens is a.A convex lens of focal length 20 cm. b.A concave lens of focal length 16 cm ?

A beam of light converges to a point P , A lens is placed in the path

1.	A beam of light converges to a point P , A lens is placed in the path of the convergent beams 12 cm from P. At what point does the beam converge if the lens is a.A convex lens of focal length 20 cm. b.A concave lens of focal length 16 cm ?
Answer» ANSWER :7.5 CMB. 48 CM

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A beam of light converges to a point P , A lens is placed in the path of the convergent beams 12 cm from P. At what point does the beam converge if the lens is a.A convex lens of focal length 20 cm. b.A concave lens of focal length 16 cm ?

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