A) \[7200\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[4800\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[10800\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[6000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: B
Solution :
In glass, wavelength will be \[=\frac{\lambda }{\mu }\] \[\frac{7200}{1.5}\] \[=4800\overset{\text{o}}{\mathop{\text{A}}}\,\]
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