HARD
12th Odisha Board
IMPORTANT
Earn 100
On what factors the focal length of a lens depends?
Important Questions on Refraction, Dispersion and Lens
HARD
12th Odisha Board
IMPORTANT
A convex lens, a glass slab, a prism and a spherical solid ball have been prepared from the same optically transparent material. Explain which of these possesses dispersive power.
HARD
12th Odisha Board
IMPORTANT
The radii of curvatures of both the surface of a lens are equal. If one of the surfaces is made plane by grinding, find the new focal length.
HARD
12th Odisha Board
IMPORTANT
An object is placed at the focus of a concave lens. Where will be the image formed.
MEDIUM
12th Odisha Board
IMPORTANT
A lens whose radii of curvature are different is forming the image of an object placed on its axis. If the lens is reversed, will the position of the image change ?
MEDIUM
12th Odisha Board
IMPORTANT
A thin convex lens is put into contact with a thin concave lens with the same focal length. Show that the resultant combination has the power equal to zero.
MEDIUM
12th Odisha Board
IMPORTANT
An object is placed at the principal focus of a convex lens of focal length . Where will its image be formed?
HARD
12th Odisha Board
IMPORTANT
The refractive index of the material of a convex lens is , it is submerged in a liquid of refractive index . A parallel beam of light is incident on the lens. Trace the path of the emergent ray. Where .
HARD
12th Odisha Board
IMPORTANT
A glass convex lens is placed in water. Will there be any change in focal length? Give reasons.
