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WorksheetsLenses
Total questions: 11
Worksheet time: 7mins
If the light ray passes through focus of a lens after refraction it passes
Parallel to principal axis
Through optical centre
Undeviated
Which lens is called converging lens?
Concave
Convex
Plano concave
If an object is placed between F and 2F of a Concave lens, What will be the nature of the image?
Real and magnified
Virtual and magnified
Virtual and diminished
If an object is placed between F and 2F of a Concave lens, What will be the nature of the image?
Real and magnified
Virtual and magnified
Virtual and diminished
In order to get the image size as same as size of the object, where should an object placed in front of convex lens?
At infinity
At focus
At centre of curvature
Which lens is used to treat hyper metropia?
Convex
Concave
What is the sign convention for the distances measured along the direction of incident light?
Positive
Negative
Which lens is used as spy lens in door?
(a)
The unit of power of lens is
(a)
If magnification is less than one (m<1) then the size of the image is
Enlarged
Diminished
Same size as object
Which lens is called converging lens?
Concave
Convex
Plano concave
