A screen is placed 2m away from the lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment. What will be the slit width if the first minimum lies 5 mm on either side of the central maximum when plane light waves of wavelength 4000 Å are incident on the slit?

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Diffraction topics include: Light diffraction, plane diffraction grating, prism and grating spectra difference, grating resolving power, fresnel and fraunhofer diffraction. Diffraction is the bending or spreading out of waves as they pass through an obstacle or aperture. It can occur with sound, electromagnetic radiation, and very small moving particles.  Diffraction occurs when the size of the obstacle or aperture is similar to the wavelength of the incident wave. For example, when light waves pass near a barrier, they bend around the barrier and spread out.  Diffraction can also occur... Show more

A screen is placed 2m away from the lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment. What will be the slit width if the first minimum lies 5 mm on either side of the central maximum when plane light waves of wavelength 4000 Å are incident on the slit?