Geometrical OpticsHard
Question
Two similar plano-convex lenses are combined together in three different ways as shown in the adjoining figure. The ratio of the focal lengths in three cases will be :-
Options
A.2 : 2 : 1
B.1 : 1 : 1
C.1 : 2 : 2
D.2 : 1 : 1
More Geometrical Optics Questions
A person can not see the objects clearly placed at a distance more than 40 cm. He is advised to use a lense of power...A hollow doubled concave lense is made of very thin transparaent material. It can be filled with air or either of two li...An object is immersed in a fluid. In order that the the object becomes invisible, it should :...In the displacement method for determining the focal length of a convex lens, the lens is displaced by distance x to aga...The angle of prism is 5o and its refractive indices for red and violet colours are 1.5 and 1.6 respectively. The angular...