A) decrease in frequency
B) increase in frequency
C) decrease in intensity
D) increase in intensity
Correct Answer: A
Solution :
Wavelength range from violet to red is \[4000\overset{\text{o}}{\mathop{\text{A}}}\,-7800\overset{\text{o}}{\mathop{\text{A}}}\,\] If there is red shift it means that \[\lambda \] (wavelength) is increasing. So, by \[v=\frac{c}{\lambda }\] frequency will decrease.
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