A portion of the lens is broken horizontally. Will we get a complete image of an object with such a lens?

From which of the following we always get virtual and erect image of an object placed at any position ?

A convex lens of focal lengths 30 cm produces 5 times magnified real image of an object What is the object distance ?

A luminous object is separated from a screen by a distance D. What is the greatest focal length that a lens should have to focus the image of the object on the screen?

Which of the following is correct for lens focusing, while seeing distant object ?

Choose the correct alternative: A luminous object is separated from a screen by a distance D. What is the greatest focal length that a lens should have to focus the image of the object on the screen?

When we see an object , the image formed on the retina is

A convex lens produces a real image double the size of the object, when the object is placed at a distance 18 cm from it. Where should the object be placed to produce a real image three times the size of the object?