Geometrical OpticsHard

Question

A narrow slit of width 1 mm is liiuminated by monochromatic light of wavelength 600 nm. The distance between the first minima on either side of a screen at a distance of 2 cm is

Options

A.1.2 cm
B.1.2 mm
C.2.4 cm
D.2.4 mm

Solution

         
For first dark fringe on either side d sin θ = λ
or      ∴
Therefore, distance between two dark fringes on either side =
Substituting the values, we have
distance 2.4 mm

Create a free account to view solution

View Solution Free
Topic: Geometrical Optics·Practice all Geometrical Optics questions

More Geometrical Optics Questions

Which one of the following form(s) a virtual and erect image for allpositions of the objecte ?...Properly arrange the effects with their reasons Effects Reasons(i) Rainbow formation (a) Reflection(ii) Red colour of da...An equiconvex lens has a power of 5 dioptre. If it is made of glass of refractive index 1.5. then radius of curvature of...The refractive index of the material of a prism is 2 and the angle of the prism is 30°. One of the two refracting su...Thin convex lens made from crown glass has focal length f. When it is measured in two different liquids having refractiv...