Optics Question 203
Question: 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
[IIT-JEE (Screening) 1999; MP PMT 2002; KCET 2003]
Options:
A) That the central maxima is narrower
B) No diffraction pattern
C) More number of fringes
D) Less number of fringes
Show Answer
Answer:
Correct Answer: B
Solution:
Diffraction is obtained when the slit width is of the order of wavelength of EM waves (or light). Here wavelength of X-rays $ (1-100{\AA}) $ is very-very lesser than slit width (0.6 mm).
Therefore no diffraction pattern will be observed.
