Optics 6 Question 26
28. Yellow light is used in a single slit diffraction experiment with slit width of $0.6 mm$. If yellow light is replaced by $X$-rays, then the observed pattern will reveal
$(1999,2 M)$
(a) that the central maximum is narrower
(b) more number of fringes
(c) less number of fringes
(d) no diffraction pattern
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Solution:
- 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 $(1-100 \AA)«$ slit width $(0.6 mm)$. Therefore, no diffraction pattern will be observed.
