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

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

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 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 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.