Geometrical OpticsHard
Question
A student wants to set up an experiment with a thin convex lens of focal length f such that a thin real object produces a focused real image on a movable screen. At how many locations along the optical axis (principal axis) can the object be placed so that the distance between the object and the focused image on the screen is equal to 3f ?
Options
A.There is no location
B.There is exactly one location
C.There are exactly two locations
D.There are exactly four locations
Solution
m =
, u = f + xu =
(f + x)u + v = 3f
f + x +
(f + x) = 3fBy solving above equation we do not get any real value of x.
Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
The exit surface of a prism with refractive index $n$ is coated with a material having refractive index $\frac{n}{2}$. W...In the given figure ABC is a right angled isosceles prism kept in air. A ray of light is incident normally as shown. Ref...A transparent solid cylindrical rod has a refractive index of . It is surrounded by air. A light rayis incident at the m...If two mirrors are kept at 60o to each other, then the number of images formed by them is...When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflecte...