A) \[1000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[800\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[1300\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[2100\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: A
Solution :
For minimum wavelength \[{{n}_{2}}=\infty ,\,{{n}_{1}}n.\] So, \[{{\lambda }_{\min }}=\frac{{{n}^{2}}}{R}=\frac{1}{{{10}^{7}}}=1000\overset{\text{o}}{\mathop{\text{A}}}\,\]
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