Question

A student using a convex lens of f=20cm
formed image of an object in front of the lens on side of screen placed on the other side of the lens

Answer 1

You can get an image of an object using convex lens if you place the object at a distance equal to its focal length or more.

So you need to place the object at a distance of 20cm or more to get a real image on screen.

Answer 2

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You can get an image of an object using convex lens if you place the object at a distance equal to its focal length or more.

So you need to place the object at a distance of 20cm or more to get a real image on screen.

HOPE SO IT WILL HELP.....