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A small source of light is to be suspended directly above the centre of a circular table of radius . What should be the height of the light source above the table so that the intensity of light is maximum at the edges of the table compared to any other height of the source

a)

b)

c)

d)


Question ID - 152805 :-

A small source of light is to be suspended directly above the centre of a circular table of radius . What should be the height of the light source above the table so that the intensity of light is maximum at the edges of the table compared to any other height of the source

a)

b)

c)

d)

1 Answer
5876 Votes
3537

Answer Key : (b) -

(b)

For maximum intensity

Applying this condition have get



Next Question :

The light takes in travelling a distance of 500 m in water. Given that  for water is 4/3 and the velocity of light in vacuum is   Calculate equivalent optical path

a)

566.64 m

b)

666.64 m

c)

586.45 m

d)

576.64 m


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