KCET · Physics · Wave Optics
In Young's double-slit experiment if yellowlight is replaced by blue light, the interferencefringes
become
- A wider
- B narrower
- C brighte!
- D darker
Answer & Solution
Correct Answer
(B) narrower
Step-by-step Solution
Detailed explanation
In Young's double slit experiment if yellow light is replacedby blue light then the interference fringes will become
narrower.
We know fringe width is \( \beta=\frac{\lambda D}{d} \)
\( \Rightarrow \beta \propto \lambda \)
Wavelength of yellow light \( > \) Wavelength of blue light
Therefore, fringe width will decrease.
narrower.
We know fringe width is \( \beta=\frac{\lambda D}{d} \)
\( \Rightarrow \beta \propto \lambda \)
Wavelength of yellow light \( > \) Wavelength of blue light
Therefore, fringe width will decrease.
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