A diffraction grating has `1.26xx10^(4)` rulings uniformly spaced over width w=25.4 mm. It is illuminated at normal incidence by blue light of wavelength 450 nm At what angles to the central axis do the second order maxima occur

A. diffraction grating has 800 lines per mm and is illuminated normally by parallel monochromatic light of wavelengths 560 nm and 590 nm. Calculate the difference in the angular positions of the first order spectra of the two lights on th same suide of the normal.

Light of wavelength 6000 Å is incident normally on single slit of width 0.23 mm. Find the angular spread between the central maxima and second-order maxima of diffraction pattern.

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]

Two slits 4.0 xx 10^(-6) m apart are illuminated by light of wavelength 600nm . What is the highest order fringe in the interference pattern?

Two slits 4.0 xx 10^(-6) m apart are illuminated by light of wavelength 600nm . What is the highest order fringe in the interference pattern?

Light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. The angular width of central maxima in the diffraction pattern is

Light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. The angular width of central maxima in the diffraction pattern is