A bulb of 100 watt is hanging at a height of one meter above the centre of a circular table of diameter 4 m . If the intensity at a point on its rim is 
, then the intensity at the centre of the table will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The illuminance at B
.......(i)
and illuminance at point C
...... (ii)
From equation (i) and (ii) 
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