A lens of focal length f gives diffraction pattern of F raunhoffer type of a slit having width a. If wavelength of light is `lambda`, the distance of first dark band and next bright band from axis is given by

Diffraction pattern of a single width 0.5 cm is formed by a lens of a focal length 40 cm. Calculate the distance between the first dark and next bright fringe from the axis. lambda = 4890 overset@A (given)

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 the diffraction pattern due to a single slit of width 'd' with incident light of wavelength 'lambda' , at an angle of diffraction 'theta' , the condition for first minimum is

The first minimum of a single slit diffraction pattern is observed at angle 2^(@) with a light of wavelength 698 nm. The width of this slit is

A linear aperture whose width is 0.02 em is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5 xx 10^(-5) cm . The distance of the first dark band of the differation pattern from the centre of the screen is .......

A parallel beam of light of wavelength lambda is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance given by

A parallel beam of light of wavelength lambda is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance given by ....