MHT CET · Physics · Thermodynamics
If Young's double slit experiment, is performed in water
- A the fringe width will decrease
- B the fringe width will increase
- C the fringe width will remain unchanged
- D there will be no change
Answer & Solution
Correct Answer
(A) the fringe width will decrease
Step-by-step Solution
Detailed explanation
As we know
\(
\beta=\frac{D \lambda}{d}
\)
and
\(
\lambda \propto \frac{1}{\mu}
\)
From Eqs. (i) and (ii)
\(\therefore\)
\(
\begin{array}{l}
\beta \propto \lambda \propto \frac{1}{\mu} \\
\beta \propto \frac{1}{\mu}
\end{array}
\)
Hence, (a) is correct.
\(
\beta=\frac{D \lambda}{d}
\)
and
\(
\lambda \propto \frac{1}{\mu}
\)
From Eqs. (i) and (ii)
\(\therefore\)
\(
\begin{array}{l}
\beta \propto \lambda \propto \frac{1}{\mu} \\
\beta \propto \frac{1}{\mu}
\end{array}
\)
Hence, (a) is correct.
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