Geometrical OpticsHard
Question
A thin slice is cut out of a glass cylinder along a plane parallel to its axis. The slice is placed on a flat plate as shown. The obseved interference fringes from this combination shall be
Options
A.straight
B.circular
C.equally spcaed
D.having fringe spacing with increases as we go outwards
Solution
Locus of equal path difference are the lines running parallel to the axis of the cylinder.
Hence, straight fringes are obtained.
Note : Circular rings (also called Newton′s rings) are observed in interference pattern when a plano-convex lens of large focal length is placed with its convex surface in contact with a plane glass plate because locus of equal path difference in this case is a circle.
Hence, straight fringes are obtained.
Note : Circular rings (also called Newton′s rings) are observed in interference pattern when a plano-convex lens of large focal length is placed with its convex surface in contact with a plane glass plate because locus of equal path difference in this case is a circle.
Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
The figure shows a combination of two thin prism producing dispersion without deviation (μ1 = 1.54, μ2 = 1.72)...An object and a screen are fixed at a distance d apart. When a lens length f is moved between the object and the screen,...A lens of focal length ′f′ is placed in between an object and screen at a distance ′D′. The lens...How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3?(70% HNO3 solution ta...An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment dista...