A new, dielectric material was developed as a protective coating for metal parts that must withstand high temperature. For designers to make use of the material, they must know what its emissivity is. Measurements of emissivity as a function of wavelength were obtained at a temperature of \(1200 \mathrm{~K}\), which is the assumed temperature of use. The table below contains the data. Assuming the material can be represented as a graybody, what would its emissivity be?

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(m) P(T)(J/m-m) (m) P(T)(J/m-m) 2. (m) P(T)(J/m-m) (m) P(T)(J/m-m) 1.3e-06 97.4 2.7e-06 349.8 4.1e-06 181.3 5.4e-06 125.1 1.5e-06 188.2 2.9e-06 338.3 4.3e-06 167.6 5.6e-06 84.7 1.7e-06 217.0 3.1e-06 375.7 4.5e-06 141.9 5.8e-06 109.7 1.9e-06 356.2 3.3e-06 273.6 4.7e-06 148.8 6e-06 100.0 2.1e-06 323.9 3.5e-06 285.5 4.8e-06 140.7 6.2e-06 69.0 2.3e-06 307.7 3.7e-06 210.5 5e-06 128.5 6.4e-06 71.4 2.5e-06 394.7 3.9e-06 197.7 5.2e-06 127.3 6.5e-06 75.5