0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

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?

Solution
Verified by Toppr

(a). According to the given case, object is virtual, u=+12 cm
The focal length of the convex lens is f=+20 cm.
Using lens equation, 1v1u=1f

1v112=120

v=7.5 cm

(b). Now the focal length of the concave lens, f=16 cm
1v1u=1f

1v112=116

v=48 cm

Was this answer helpful?
77
Similar Questions
Q1
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?
View Solution
Q2
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?
View Solution
Q3
A beam of light converges to a point P. A concave lens of focal length 16 cm is placed in the path of the convergent beam 12 cm from P. How far from the lens does the beam converge?


View Solution
Q4
A beam of light converges to a point P. A concave lens of focal length 16 cm is placed in the path of the convergent beam 12 cm from P. How far from the lens does the beam converge?


View Solution
Q5
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

View Solution