An instructor wishes to determine the wavelength of the light in a laser beam. To do so, she directs the beam toward a partition with two tiny slits separated by 0.170 mm. An interference pattern appears on a screen that lies 5.05 m from the slit pair.   The instructor's measurements show that two adjacent bright interference fringes lie 1.60 cm apart on the screen.   What is the laser's wavelength (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.