Question
Question: A diffraction is obtained by using a beam of red light. What will happen if the red light is replace...
A diffraction is obtained by using a beam of red light. What will happen if the red light is replaced by the blue light.
A
Bands will narrower and crowd full together
B
Bands become broader and further apart
C
No change will take place
D
Bands disappear
Answer
Bands will narrower and crowd full together
Explanation
Solution
Band width ∝ λ,
λblue < λred, hence for blue light the diffraction bands becomes narrower and crowded together.