In a single slit diffraction, the width of slit is `0.5 cm`, focal lengths of lens is 40 cm and wavelength of light is 40 cm and wavelength of light is `4890Å`. Distance of rist dark fringe is

In a single slit diffraction, the width of slits is 0.5cm , focal length of lens is 40 cm and of first dark fringe is

A diffraction pattern is produced by a single slit of width 0.5mm with the help of a convex lens of focal length 40cm. If the wavelength of light used is 5896Å. then the distance of first dark fringe from the axis will be-

In Fraunhoffer diffraction by a single slit, the width of the slit is 0.01 cm. If the wavelength of the light incident normally on the slit is 5000 Å the angular distance of second maxima from the mid line of central maxima is ...... rad.

In a Young’s double slit experiment, the slit separation is 0.2 cm , the distance between the screen and slit is 1 m . Wavelength of the light used is 5000 Å . The distance between two consecutive dark fringes (in mm ) is

In the Young's double slit experiment, the slits are 0.4 cm apart and the screen is 100 cm awayIf the wavelength of light used is 5000 Å then the distance between the fourth dark fringe and central bright will be ......

First diffraction minima due to a single slit of width 10^-4 cm is at theta=30^@ . The wavelength of the light used is –

First diffraction minima due to a single slit of width 10^-4 cm is at theta=30^@ . The wavelength of the light used is –

First diffraction minimum due to a single slit of width 1.0xx10^(-5) cm is at 30^@ . Then wavelength of light used is,