EASY
10th CBSE
IMPORTANT
Earn 100
With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the concave lens on the diagram.
Important Questions on Refraction of Light
EASY
10th CBSE
IMPORTANT
State whether concave lens has a real focus or a virtual focus.
EASY
10th CBSE
IMPORTANT
List some things that concave lens and convex mirror have in common.
EASY
10th CBSE
IMPORTANT
Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
(a) At ,
(b) Between and the optical centre of the lens.
EASY
10th CBSE
IMPORTANT
An object is placed well outside the principal focus of a convex lens. Draw a ray diagram to show how the image formed, and say whether the image is real or virtual.
HARD
10th CBSE
IMPORTANT
What is the effect on the size and position of the image of moving the object towards the lens.
HARD
10th CBSE
IMPORTANT
What is the effect on the size and position of the image on moving the object away from the lens?
EASY
10th CBSE
IMPORTANT
Explain what is meant by a virtual, magnified image.
EASY
10th CBSE
IMPORTANT
Draw a ray diagram to show the formation of a virtual magnified image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly.
