For an opaque surface, the absorptivity (a), transmissivity (1) and reflectivity (p) are related by the equation
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a+p=1
a+p = 1
a+p+=0
a+p= 0
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a+ p = 1
Explanation:
a + t + p = 1
for opaque object t = 0
so it's, a+ p = 1
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