AP EAMCET · PHYSICS · Wave Optics
A diffraction pattern is obtained by using a beam of red light. If the red light is replaced by the blue light
- A bands will be narrower
- B bands become broader
- C no change in the width of the bands takes place
- D bands disappear
Answer & Solution
Correct Answer
(A) bands will be narrower
Step-by-step Solution
Detailed explanation
The width of the fringe in diffraction, \(\beta=\frac{D \lambda}{d}\) Hence, when the red light is replaced by blue light, the wavelength decreases which means that the fringe width decreases and band will be narrower.
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