Three discrete spectral lines occur at angles of 10.3°, 13.6°, and 14.5°, respectively, in the first-order spectrum of a diffraction grating spectrometer. (a) If the grating has 3720 slits/cm, what are the wavelengths of the light? 2, = 486.4 v nm (10.3°) 647.3 x nm (13.6°) 13 = nm (14.5°) (b) At what angles are these lines found in the second-order spectra? e = |4 X (2,) (A2)

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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.