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PhysicsJEE Main 6 Apr 2026, Shift 1·Q15·MCQ·Easy

Electromagnetic Waves · EM waves

A point light source emits E.M. waves in free space. A detector, placed at a distance of L m, measures the intensity as I0I_0. The detector is now shifted to another location on the same spherical surface ensuring the angle between original location and new location as 45∘45^\circ. The measured intensity at new location will be .
  1. (1)I04\dfrac{I_0}{4}
  2. (2)I0I_0
  3. (3)I02\dfrac{I_0}{\sqrt2}
  4. (4)I02\dfrac{I_0}{2}

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