Question

What happens to fringe width when the wavelength of light increases while screen distance and slit separation remain unchanged?

Options

• Fringe width increases

• Fringe width decreases

• Fringe width becomes zero

• Fringe width changes randomly

Answer 1

Fringe width is directly proportional to wavelength in \\[\\beta=\\frac{\\lambda D}{d}\\]. Increasing wavelength therefore increases fringe width.