4. Describe Huygen’s Principle. (b) A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the wavelength of the light decreases, describe what happens to the diffraction pattern. (c) A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the slit width increases, describe what happens to the diffraction pattern. (d) Light of wavelength 628.0 nm is incident on a narrow slit. The diffraction pattern is viewed on a screen 78.5 cm from the slit. The distance on the screen between the third order minimum and the central maximum is 1.75 cm. What is the width a of the slit in micrometers (μm)?

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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.