Q. Yellow light is used in single slit diffraction experiment with slit width 0.6 mm. If yellow light is replaced by X-rays, then the pattern will reveal that
A) No diffraction pattern
B) That the central maxima narrower
C) Less number of fringes
D) More number of fringes
Explanation
(a) To see the diffraction pattern, wavelength of radiation must be of the order of the dimensions of the slit. But here slit width 0.6 mm is very much large in comparison to wavelength of X-ray $\left( \lambda = 1\ \mathring{\mathrm{A}}\ or\ 10^{- 7}mm \right).$ Therefore no diffraction pattern is observed.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.