Consider a diffraction grating with a grating constant of 300 lines/mm. The grating is illuminated with a monochromatic light source of unknown wavelength. A screen is placed at a distance 1m away and the 1st order maxima is measured to be at a distance of 49cm from the central maxima. What's the wavelength of the light? Answer in nm

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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.