A) \[\sqrt{3}x+y=0\]
B) \[x+\frac{\sqrt{3}}{2}y=0\]
C) \[\frac{\sqrt{3}}{2}x+y=0\]
D) \[x+\sqrt{3}y=0\]
Correct Answer: B
Solution :
Power of a lens is reciprocal of its focal length. Power of combined lens is \[P={{P}_{1}}+{{P}_{2}}\,=-15+5=-10D\] \[\therefore \,\,\,f=\frac{1}{P}\,=\frac{100}{-10}\,cm\] \[-2\]
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