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.
