A lamp of 250 candela power is hanging at a distance of 6 m from a wall. The illuminance at a point on the wall at a minimum distance from lamp will be
a)
9.64 lux
b)
4.69 lux
c)
6.94 lux
d)
None of these
A lamp of 250 candela power is hanging at a distance of 6 m from a wall. The illuminance at a point on the wall at a minimum distance from lamp will be
a)
9.64 lux
b)
4.69 lux
c)
6.94 lux
d)
None of these
Question ID - 152796 | SaraNextGen Top Answer
A lamp of 250 candela power is hanging at a distance of 6 m from a wall. The illuminance at a point on the wall at a minimum distance from lamp will be
a)
9.64 lux
b)
4.69 lux
c)
6.94 lux
d)
None of these
|
A lamp of 250 candela power is hanging at a distance of 6 m from a wall. The illuminance at a point on the wall at a minimum distance from lamp will be |
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|
a) |
9.64 lux |
b) |
4.69 lux |
c) |
6.94 lux |
d) |
None of these |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
(c) At minimum distance, incidence is normal. Therefore, |
lux127 votes
Answer Link
127