Optics 6 Question 26

28. Yellow light is used in a single slit diffraction experiment with slit width of 0.6mm. If yellow light is replaced by X-rays, then the observed pattern will reveal

(1999,2M)

(a) that the central maximum is narrower

(b) more number of fringes

(c) less number of fringes

(d) no diffraction pattern

Show Answer

Solution:

  1. Diffraction is obtained when the slit width is of the order of wavelength of light (or any electromagnetic wave) used. Here, wavelength of X-rays (1100\AA)« slit width (0.6mm). Therefore, no diffraction pattern will be observed.


NCERT Chapter Video Solution

Dual Pane