A) 15
B) 12
C) 13
D) 11
Correct Answer: D
Solution :
\[n=\frac{360}{\theta }-1\] \[\therefore \] \[5=\frac{360}{\theta }-1\] \[\Rightarrow \] \[\theta ={{60}^{o}}\] On reducing the angle by\[{{30}^{o}}\], the new angle between the mirror becomes\[{{30}^{o}}\] Now, \[\frac{360}{\theta }=\frac{360}{60}=12\] Since, this is an even number, number of images seen\[=12.1=11\].You need to login to perform this action.
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