EASY
10th ICSE
IMPORTANT
Earn 100

Draw diagrams to show the first and second focus of a convex lens.

Important Questions on Refraction Through a Lens

EASY
10th ICSE
IMPORTANT
Define the second focal length of a convex lens. Explain with diagram.
EASY
10th ICSE
IMPORTANT
Define the second focal length of a concave lens. Explain with diagram. 
EASY
10th ICSE
IMPORTANT
What do you mean by a real or a virtual image?
EASY
10th ICSE
IMPORTANT
Why a virtual image cannot be formed on a screen?
MEDIUM
10th ICSE
IMPORTANT
What are the two convenient light rays used to obtain the image of any object placed in front of a lens? Explain your answer with a proper diagram.
EASY
10th ICSE
IMPORTANT
Why does the light ray directed towards optical centre of the lens do not deviate from its path after refraction?
EASY
10th ICSE
IMPORTANT
Parallel light rays from a distant object falls on a convex lens at some angle to the principle axis. Draw a neat ray diagram to show the image formation from the lens.
MEDIUM
10th ICSE
IMPORTANT
A thin watch glass is partially filled with glycerine. What type of lens this liquid forms?