Geometrical OpticsMedium
Question
A point source is kept at a distance of 1000 m has an illumination l. To change the illumination to 16 In the new distance should become
Options
A.250 cm
B.500 cm
C.750 cm
D.800 cm
Solution
We know illumination intensity
Initial illumination =I. changed value =-16 IInitial distance =1000m. changed value = x
⇒
⇒ x2 =
⇒ x = 
= 250 m
Initial illumination =I. changed value =-16 IInitial distance =1000m. changed value = x
⇒
⇒ x2 =
⇒ x = = 250 mCreate a free account to view solution
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