A slit of width 0.025 mis placed in front of a lens of focal length 50 cm. The slit is illuminated with light of wavelength 5900 Å. Calculate the distance between the centre and first dark band of diffraction pattern obtained on a screen placed at the focal plane of the lens.

A linear aperture whose width is 0.02cm is placed immediately in front of a lens of focal length 60cm . The aperture is illuminated normally by a parallel beam of wavelength 5xx10^-5cm . The distance of the first dark band of the diffraction pattern from the centre of the screen is

A slit is located 'at infinity' in front of a lens of focal length 1 m and is illuminated normally with light of wavelength 6000Å . The first minima on either side of the central maximum of the diffraction pattern observed in the focal plane of the lens are separated by 4 mm. What is the width of the slit? [0.3 mm]

A slit of width d is placed in front of a l ens of focal length 0.5m and is illuminated normally with light of wavelength 5.89xx10^(-7)m . The first diffraction minima on either side of the central diffraction maximum are separated by 2xx10^(-3)m . The width d of the slit is "_________" m.

Red light of wavelength 6500 Å from a distant source falls on a slit 0.50 mm wide. Calculate the distance between first two dark bands on each side of central bright band in the diffraction pattern observed on a screen placed 1.8 m from the slit.

A screen is placed 50 cm from a single slit, which is illuminated with 6000 Å light. If the distance between the first and third minima in the diffraction pattern is 3.00 mm , what is the width of the slit ?

The red light of wavelength 5400 Å from a distant source falls on a slit 0.80 mm wide. Calculate the distance between the first two dark bands on each side of the central bright band in the diffraction pattern observed on a screen place 1.4m from the slit.

Light of wavelength 6000 Å from a distance source falls on a slit 0.5 mm wide. The distance between two dark bands on each side of the central bright band of the diffraction pattern observed on a screen placed at a distance 2m from the slit is

Light of wavelength 600 nm falls from a distant source on a slit 0.6 mm wide. Find the distance between the two dark bands, on either side of the central bright band of the diffraction pattern observed , on a screen placed 2 m from the slit.

A single slit located effectively at infinity in front of a lens of focal length 1 m , and it is illuminated normally with light of wavelength 600 nm . The first minimum on either side of central maximum are separated by 4 mm . Width of the slit is