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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

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  1. That the central maxima is narrower    
  2. No diffraction pattern    
  3. More number of fringes    
  4. Less number of fringes    

    Answer:The correct answer is: No diffraction patternDiffraction is obtained when the slit width is of the order of wavelength of EM waves (or light). Here wavelength of X-rays (1-100 Å) is very-very lesser than slit width (0.6 mm). Therefore no diffraction pattern will be observed.

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