MCQ
A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of $300^o$. The number of observable image is :
- A$10$
- ✓$11$
- C$12$
- D$13$
✓
Answer
Correct option: B.
$11$
b
$\delta = (360 - 2\theta )\,\,\,\, \Rightarrow \,\,\,300 = 360 - 2\theta $
$\delta = (360 - 2\theta )\,\,\,\, \Rightarrow \,\,\,300 = 360 - 2\theta $
$ \Rightarrow \,\,\,\theta = {30^o}$.
પ્રતિબિંબની સંખ્યા $ = \frac{{360}}{{30}} - 1 = 11$
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