SOLUTION: A small spherical light source is 1.8m above the centre point of a square table of a side of 2 figure 1. the illuminance E at the centre point of the table is 300 lx.
calculate
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Question 935922: A small spherical light source is 1.8m above the centre point of a square table of a side of 2 figure 1. the illuminance E at the centre point of the table is 300 lx.
calculate the ecrnr at the tip of the table.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Calculate the distance from the bulb to the corner of the table (I assume that's what you mean by tip).
Illuminance is inversely proportional to the square of the distance.
Since the distance from the source to the edge of the table is 1.8 down, 1 up, and 1 over, the source is no longer directly over the point but at an angle,.
degrees
lx
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