A point source of light moves in a straight line parallel to a plane table. Consider a small portion of the table directly below the line of movement of the source. The illuminance at this portion varies with its distance r from the source asA. `E prop (1)/(r)`B. `E prop (1)/(r^(2))`C. `E prop (1)/(r^(3))`D. `E prop (1)/(r^(4))`

A point source of light moves in a straight line parallel to a plane t

1.	A point source of light moves in a straight line parallel to a plane table. Consider a small portion of the table directly below the line of movement of the source. The illuminance at this portion varies with its distance r from the source asA. `E prop (1)/(r)`B. `E prop (1)/(r^(2))`C. `E prop (1)/(r^(3))`D. `E prop (1)/(r^(4))`
Answer» Correct Answer - C

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