Question

Yellow light is used in single slit diffraction experiment with slit width `0.6mm`. If yellow light is replaced by X-rays then the pattern will reveal
A. (a) That the central maxima is narrower
B. (b) No diffraction pattern
C. (c) More number of fringes
D. (d) Less number of fringes

Answer 1

Correct Answer - B
Diffraction is obtained when the slit width is of the order of wavelength of EM waves (or light). Here wavelength of X-rays `(1-100Å)` is very-very lesser than slit width `(0.6mm)`. Therefore no differaction pattern will be observed.