Suppose we now decrease the size of the pinhole by half. How should the wavelength of the incoming wave be adjusted so that now exactly 4 bright fringes lie inside the central bright fringe of the original case

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the north and south. jet streams follow the boundaries between hot and cold air. the earth's rotation is responsible for the jet stream as well.

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