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A bulb of 100  is hanging at a height of one meter above the centre of a circular table of diameter . 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)



Question ID - 153039 | SaraNextGen Top Answer

A bulb of 100  is hanging at a height of one meter above the centre of a circular table of diameter . 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)

1 Answer
127 votes
Answer Key / Explanation : (d) -

(d)

The illuminance at

And illuminance at point

From equation (i) and (ii)

127 votes


127