Physics - Wave Optics Question with Solution | TestHub

As we know

$\beta =\frac{\text{D}}{\text{d}}\lambda$.....(i)

and$\lambda \propto \frac{1}{\mu }$.....(ii)

From eqs. (i) and (ii),

$\beta \propto \lambda \propto \frac{1}{\mu }$

${\beta }_1=\frac{\beta }{\mu }$