Suppose that you are using a microscope to view two closely spacedcells. For a given lens diameter, which color of light would you use toachieve the best possible resolving power? (a) Red (b) Yellow (c) Green(d) Blue (e) All the colors give the same resolving power.

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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.