Light of wavelength 580NM is incident on a slit of width 2.75 × 10^-6 m. The observing screen is placed 2.00 m from the slit. 1) Find the width of central maximum 2) Say two things that would make width of the central maximum smaller?

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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.