Light wavelength 650 nm is incident normally upon a glass plate the glass plate rests on top of second plate so that hey touch at one end and are separated by 0.0325 mm at the other end as shown in the figure. Which range of values contains the horizontal separation between adjacent bright fringes?

Options

A. 1.1 mm to 1.4 mm
B. 1.4 mm to 2.8 mm
C. 2.8 mm to 4.2 mm
D. 4.2 mm to 5.6 mm

Answer

A

Explanation

`d=` distance between the adjacent bright fringe
`d=(Llamda)/(2D)implies((120xx10^(-3))(650xx10^(-9)))/(2xx(0.325xx10^(-3)))`
`d=1.2mm`