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

A converging lens of focal length 20 cm and diameter 5 cm is out along the line AB. The part of lens shown shaded in the...A point object O is placed at a distance of 20 cm from a convex lens of focal length 10 cm as shown in figure. At what d...A transparent solid cylindrical rod has a refractive index of . It is surrounded by air. A light ray is incident at the ...A person wears glasses of power - 2.5 D. The defect of the eye and the far point of the person without the glasses are r...In a compound microscope, the intermediate image is...