- Question Answer
- To find the image-distance for varying object-distances in case of a convex lens,
. To find the image-distance for varying object-distances in case of a convex lens,
a student obtains on a screen a sharp image of a bright object placed very far from the lens. After that he gradually moves the object towards the lens and each time focuses its image on the screen.
(a) In which direction-towards or away from the lens, does he move the screen to focus the object?
(b) What happens to the size of image-does it increase or decrease?
(c) What happen when he moves the object very close to the lens?
(a) He moves the screen away from lens to focus the object
(b) The size of the image increases.
(c) When the object is placed very close to the lens, then no image will be formed on the screen.