Light that has a wavelength of 530 nm is incident on a single slit that is 30.0 µm wide. 1) Determine the angular location of the first dark fringe that is formed on a screen behind the slit: (Express your answer to three significant figures.) 2) Determine the angular location of the second dark fringe that is formed on a screen behind the slit. (Express your answer to three significant figures.) 3) Determine the angular location of the third dark fringe that is formed on a screen behind the slit. (Express your answer to three significant figures.

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.