Question

Width of slit in a single slit diffraction experiment such that $20$ maxima of double slit interference pattern are obtained within central maxima of the diffraction pattem is (Slit separation for double slit arrangement = $2mm$ )

• A. 0.05 mm
• B. 0.1 mm
• C. 0.2 mm
• D. 0.4 mm

Answer 1

Answer: (C)

$20\frac{D\lambda }{d}=\frac{2D\lambda }{b},$
$d=2mm$