A point light source emits E.M. waves in free space. A detector, placed at a distance of m, measures the intensity as

Question

A point light source emits E.M. waves in free space. A detector, placed at a distance of $L$ m, measures the intensity as $I_{0}$ . The detector is now shifted to another location on the same spherical surface ensuring the angle between original location and new location as $45 °$ . The measured intensity at new location will be ______. [2026]

Smart Achievers · Accepted Answer

(2)

Distance is same, so, intensity is also same.

Solution

1 $\frac{I_{0}}{4}$

2 $I_{0}$

3 $\frac{I_{0}}{\sqrt{2}}$

4 $\frac{I_{0}}{2}$

Ans.
(2)

Distance is same, so, intensity is also same.

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Solution

1 I04

2 I0

3 I02

4 I02