Part A Blue light of wavelength 460 nm passes through an interference grating with a slit spacing of 0.001 mm and makes an interference pattern on the wall. How many bright fringes will be seen? O 1 O 3 O 7 Submit Request Answer

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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.