A) With a circular path of radius 0.45 cm
B) With a square of side 1 cm
C) It cannot be covered
D) None of the above
Correct Answer: A
Solution :
Only the rays contained in the cone of vision will be able to come out \[r=\frac{h}{\sqrt{{{\mu }^{2}}-1}}=\frac{0\cdot 5}{\sqrt{1\cdot 25}}=0\cdot 45\]
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