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

Q. A beam of light converges at a point P Now a lens is placed in the path of the convergent beam $12\text{cm}$ from P. At what point does the beam converge if the lens is

A) a convex lens of focal length $20\text{cm}$?

B) a concave lens of focal length $16\text{cm}$?

Q. A beam of light converges at a point P. Now a lens is placed in thepath of the convergent beam 12cm from P. At what point does thebeam converge if the lens is (a) a convex lens of focal length 20cm,and (b) a concave lens of focal length 16cm?

Q. A beam of light converges to a point $P$. A concave lens of focal length $16cm$ is placed in the path of the convergent beam $12cm$ from $P$. How far from the lens does the beam converge?

Q. A beam of light converges to a point $P$. A concave lens of focal length $16cm$ is placed in the path of the convergent beam $12cm$ from $P$. How far from the lens does the beam converge?

Q. Figure given below shows a beam of light converging at point P. When a convex lens of focal length 16 cm is introduced in the path of the beam at a place O shown by dotted line, the beam converges at a distance x from the lens. The value x will be equal to