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Sλ = Bλ(T4) T4

Sλ = Bλ(T3)

T3 T2

Sλ = Bλ(T2) Sλ = Bλ(T1)

T1

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Iλ(0,π/2) = aλ + bλ Iλ(0,θ)

Iλ(0,π/2) = aλ

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