If i measure the wavelength of light from a single color source and i direct the light through two slits spaced 0.25 mm apart, and an interference pattern is created on a screen placed 4.0 m away. I established that the distance between the first and the seventh dark line is 6.0 cm. What is the wavelength of the light source?

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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.