EASY
JEE Main
IMPORTANT
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The angle of deviation through a prism is minimum when
(A) Incident ray and emergent ray are symmetric to the prism
(B) The refracted ray inside the prism becomes parallel to its base
(C) Angle of incidence is equal to that of the angle of emergence
(D) When angle of emergence is double the angle of incidence
Choose the correct answer from the options given below :
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Important Questions on Ray Optics
MEDIUM
JEE Main
IMPORTANT
The refractive index of a converging lens is . What will be the focal length of this lens if it is placed in a medium of same refractive index ? (Assume the radii of curvature of the faces of lens are and respectively)
EASY
JEE Main
IMPORTANT
Red light differs from blue light as they have :
EASY
JEE Main
IMPORTANT
The thickness at the centre of a plano convex lens is and the diameter is If the speed of light in the material of the lens is The focal length of the lens is ___________.
EASY
JEE Main
IMPORTANT
The image of an object placed in air formed by a convex refracting surface is at a distance of behind the surface. The image is real and is at of the distance of the object from the surface. The wavelength of light inside the surface is times the wavelength in air. The radius of the curved surface is , the value of is ______ .
EASY
JEE Main
IMPORTANT
Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as nonuniform and distorted. The doctor diagnosed the problem as :
EASY
JEE Main
IMPORTANT
Three rays of light, namely red , green and blue are incident on the face of a right angled prism as shown in figure.
The refractive indices of the material of the prism for red, green and blue wavelength are and respectively. The colour of the ray(s) emerging out of the face is :
EASY
JEE Main
IMPORTANT
The focal length is related to the radius of curvature of the spherical convex mirror by:
HARD
JEE Main
IMPORTANT
The same size images are formed by a convex lens when the object is placed at or at from the lens. The focal length of convex lens is
