A) 25 Lux
B) 50 Lux
C) 75 Lux
D) 150 Lux
Correct Answer: A
Solution :
Intensity \[E=\frac{I}{{{r}^{2}}}\] \[=\frac{100}{{{(2)}^{2}}}=\frac{100}{4}=25\,\text{lux}\]You need to login to perform this action.
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