Question

what happens to diffraction pattern if slit width is lesser than wavelength of light?​

Answer 1

When the gap width is larger than the wavelength (bottom movie), the wave passes through the gap and does not spread out much on the other side. When the gap size is smaller than the wavelength (top movie), more diffraction occurs and the waves spread out greatly – the wavefronts are almost semicircular.

⠀

$ItzGurung \beta o \gamma$

$\huge\underline{\underline{\texttt{\pink{Follow \:me}}}}$