41. The magnitude of the fractional energy change for the photon is given by ∆∆∆λ∆λ∆λEEhchcphph==FHGIKJ=−FHGIKJ(//λ)λλ∆1λλ1λλ+λ+1βwhere = 0.10. Thus ∆λ= λ/(1 – ). We substitute this expression for ∆λin Eq. 38-11 and solve for cos
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