1.

Yellow light is used in single slit diffraction experiment with slit width 0.6 nm. If yellow light is replaced by X-rays then the ......

Answer»

no diffraction PATTERN will obtained.
central MAXIMUM obtain wide.
central maximum obtain narrow,
number of FRINGES decreases

Solution :Diffraction depend on `(lambda)/(d)`
For YELLOW ligth `(lambda)/(d)=(6xx10^(-7))/(6xx10^(-10))=1000`
`:.` Diffraction is possible
but for X-ray `=(lambda)/(d)=(100Å)/(6xx10^(-10))=(100xx10^(-10))/(6xx10^(-10))`
`=(lambda)/(2)=16.25`
which is far less than the yellow light so it will not cause diffraction. So the diffraction pattern will not be obtained.


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