$A$ point light source emits electromagnetic ($E$.$M$.) waves in free space. $A$ detector, placed at a distance of $L \text{ m}$, measures the intensity as $I_o$. The detector is now shifted to another location on the same spherical surface, ensuring the angle between the original location and the new location is $45^{\circ}$. The measured intensity at the new location will be . . . . . . .
- A$\frac{I_o}{4}$
- B$I_o$
- C$\frac{I_o}{\sqrt{2}}$
- D$\frac{I_o}{2}$
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