2a) Calculate the illuminance at points P1 and P2. Source of light 1400 cd Source of light 1000 cd 3 m P1 P2 1.8 m 2 m NOT TO SCALE 2b) Briefly outline the practical limitations of using 'point source' calculations and name the method used to overcome this. (Hint: it is a calculation).
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Using the Pythagorean theorem, we can calculate the distances as follows: For P1: Distance from 1400 cd light source: √(3^2 + 1.8^2) = √(9 + 3.24) = √12.24 ≈ 3.5 m Distance from 1000 cd light source: √(2^2 + 1.8^2) = √(4 + 3.24) = √7.24 ≈ 2.69 m For Show more…
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