An echellette grating that contains 1450 blazes/mm was irradiated with a polychromatic beam at an incident angle 48 to the grating normal. Calculate the wavelength of radiation in nm, that would appear for the first order beam at an angle of reflection of 110.

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Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.