In a Young's double slit experiment, the slit separation is doubled. This results in 1. an increase in fringe intensity. 2. a halving of the wavelength. 3. a halving of the fringe spacing. 4. a doubling of the fringe spacing. 5. a decrease in fringe intensity.

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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.