Two slits 4 mm apart, are illuminated by light of wavelength 6000 A. What will be the fringe width on a screen placed 2 m from the slits?
Show Hint
To find the fringe width in an interference pattern, use the formula \( \beta = \frac{\lambda D}{d} \), where \( \lambda \) is the wavelength, \( D \) is the distance to the screen, and \( d \) is the slit separation.