A point light source emits E.M. waves in free space. A detector, placed at a distance of m, measures the intensity as . The detector is now shifted to another location on the same spherical surface ensuring the angle between original location and new location as 45°. The measured intensity at new location will be ________.
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JEE Main 2026 · 6 Apr · Shift 1, Physics question 40
Answer and worked solution
Official answer: B
Point source. The intensity depends only on the distance from the source. Every point on the same sphere receives , whatever the angle.
(B)