Optics Question 199

Question: A diffraction is obtained by using a beam of red light. What will happen if the red light is replaced by the blue light

[KCET 2000; BHU 2001]

Options:

A) Bands will narrower and crowd full together

B) Bands become broader and further apart

C) No change will take place

D) Bands disappear

Show Answer

Answer:

Correct Answer: A

Solution:

Band widthµ l, Q lblue < lred, hence for blue light the diffraction bands becomes narrower and crowded together.



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