If a piece of paper is placed at the position of a virtual image of a strong light source, will the paper burn after sufficient time ? What happens if the image is real? What happens if the image is real but the source is virtual ?

What is a real image?

What happens to the image distance in the eye when we increase the distance of an object from the eye ?

Which of the following do not form diminished virtual image of a real object ?

A student focuses the image of a well illuminated distant object on a screen using a convex lens. After that the gradually moves the object towards the lens and each time focuses its image on the screen by adjucting the lens. (a) In which direction -towards the screen or away from the screen, does he move the lens ? (b)What happens to the size of the image-does it decrease or increase ? (c) What happens to the image on the screen when he moves the object very close to the lens ?

What is meant by magnification ? Write its expression. What is its sign for the a. real b. virtual, image?

An object is placed at a distance of 15 cm in form of a convex mirror of radius of curvature 10 cm. a.where will the image form? B. Find the magnification m. c. What will be the nature of image real or virtual?

Given an optical axis MN and the positons of a real object AB and its image A 'B' , detormine diagramatically the positon of the lens (its optical centre O ) and its foci, it it a converging or diverging lens? Is the image real or virtual?

Differentiate between a real and a virtual image.

Differentiate between a real and a virtual image.

If the distance between the virtual image from Its real object is 60 cm in case of a concave mirror . The focal length of the concave mirror If the image formed is 3 times magnified image is