The figure shows a schematic diagram showing the arrangement of Young’s double slit experiment
$\mathrm{d}<<1$ and $\mathrm{d}<<\mathrm{D}, \frac{\lambda}{\mathrm{d}} << 1$
Choose the correct statement related to wavelength of light used.
Answer & explanation
Correct answer: option 4
Fringe width $\beta=\frac{\lambda D}{d}$,
thus β ∝ λ
The position of central maxima is independent of the wavelength of the light used.
The position of the nth maxima,
$\mathrm{y}_{\mathrm{n}}=\frac{\mathrm{n} \lambda \mathrm{D}}{\mathrm{d}}$
Thus, smaller the value of λ, lesser the value of yn