Three discrete spectral lines occur at angles of 10.2°, 13.8°, and 15.0°, respectively, in the first-order spectrum of a diffraction grating spectrometer. (a) If the grating has 3740 slits/cm, what are the wavelengths of the light? ?1 = answer nm (10.2°) ?2 = answer nm (13.8°) ?3 = answer nm (15.0°) (b) At what angles are these lines found in the second-order spectra? ? = answer ° (?1) ? = answer ° (?2) ? = answer ° (?3)

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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.