A strong parallel beam of monochromatic light is incident on a thin plate with a small circular hole of diameter `10^(-3)` m. if the screen be moved through a distance of 0.125 m from the first position when the centre is black to the second similar position, what is the wavelength of light used ?

A parallel beam of monochromatic light of wavelength 5900Å falls normally on a convex lens of diameter 10cm which focusses the light on a flat normal screen located at a distance of 20cm from the lens. What would be the radius of the central bright spot formed on the screen?

In a biprism experiment, using monochromatic light. Fringes are obtained on a screen placed at a distance D from the slits. Separated by 1mm. If the screen is moved through 5 cm towards the slits, the fringe width changes by 0.03 mm. what is the wavelength of light used?

A parallel beam of monochromatic light off wavelength lamda=5xx10^(-7)m is incident normally on a single narrow slit of width 10^(-3) mm. what is angle of diffraction, the first minimum if formed?

A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1mm .When the diffraction pattern is seen on a screen on a screen placed at a distance of 2m .the width of principal maxima is found to be 2.5mm .the wave length of light is

A parallel beam of monochromatic light of wavelength 450 m passes through a long slit of width 0.2 mm. find the angular divergence in which most of the light is diffracted.

In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by 5xx10^-2m towards the slits the change in fringe width is 3xx10^-5m . If separation between the slits is 10^-3m , the wavelength of light used

In a double slit experiment, with monochromatic light, finges are obtained on a screen placed at some distance from the slits. If the screen is moed by 4xx10^(-2) m towards the slits, the changes in fringe width is 2xx10^(-5) m. If the separation between the slits is 10^(-3) m then wavelength of light used is

Two coherent sources are 0.3 mm apart. They are 0.9m away from the screen. The second dark fringe is at a distance of 0.3cm from the centre. Find the distance of fourth bright fringe from the centre. Also, find the wavelength of light used.