Optics Ques 142
- 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
Show Answer
Answer:
Correct Answer: 142.(d)
Solution:
Formula:
- 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.
BETA
