Question

A slit of size $0.15cm$ is placed at $2.1m$ from a screen. On illuminated it by a light of wavelength $5\times {10}^{-5}cm$. The width of diffraction pattern will be:-

• A. $70nm$
• B. $0.14nm$
• C. $1.4nm$
• D. $.014nm$

Answer 1

The correct option is C $1.4nm$