An object of size 5 cm is placed in front of converging lens of focal length 20cm at a distance - Physics - Light - Reflection and Refraction

Question

An object of size 5 cm is placed in front of converging lens of
focal length 20cm at a distance 30 cm from the lens find the
position nature and size of image

Rohit Babu · Accepted Answer

Dear Student,Given,ho=5cm,f=+20cm(Convex lens), u=-30cmWe know,1f=1v-1u⇒120=1v-1-30=1v+130⇒1v=120-130=3-260=160⇒v=60cmImage is formed on the opposite side of the lens at a distance of 60cm from it
As v is positive, the image is real and inverted
Magnification is,m=vu=hih0⇒60-30=hi5Height of the image is,hi=60×5-30=-10cmImage is real and inverted and is twice the size of the object
Regards

An object of size 5 cm is placed in front of converging lens of focal length 20cm at a distance 30 cm from the lens find the position nature and size of image.