Answer:
[tex]\boxed{\textbf{0.0046 g/cm}^{2}}[/tex]
Explanation:
1. Convert inches to centimetres
[tex]l= \text{4.1 in} \times \dfrac{\text{2.54 cm}}{\text{1 in}} = \text{10.2 cm}\\\\w= \text{3.5 in} \times \dfrac{\text{2.54 cm}}{\text{1 in}} = \text{8.89 cm}[/tex]
2. Calculate the area
A = lw = 10.2 × 8.89= 90.3 cm²
3. Calculate the absorber thickness
[tex]\text{Absorber thickness} = \dfrac{\text{0.415 g}}{\text{90.3 cm}^{2}} = \textbf{0.0046 g/cm}^{2}\\\\\text{The absorber thickness is $\boxed{\textbf{0.0046 g/cm}^{2}}$}[/tex]
