Question

The fringe width is given as

$\beta = \frac{\lambda}{\theta}$ ...(6.65)

Answer 1

$\beta = \frac{\lambda}{\theta}$

Answer 2

The fringe width ($\beta$) in an interference pattern produced by two light beams converging at an angle ($\theta$) is given by the formula $\beta = \frac{\lambda}{\theta}$. This equation signifies that the fringe width is directly proportional to the wavelength of light ($\lambda$) and inversely proportional to the angle of convergence ($\theta$).