A) \[12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[0.31\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[0.124\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
Wavelength\[\lambda =\frac{12375}{E}\overset{\text{o}}{\mathop{\text{A}}}\,\] \[=\frac{12375}{100\times {{10}^{3}}}\overset{\text{o}}{\mathop{\text{A}}}\,\] \[=0.12375\overset{\text{o}}{\mathop{\text{A}}}\,\] \[=0.124\overset{\text{o}}{\mathop{\text{A}}}\,\]
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