Figure 2.3. Amplitude of the delay changes with the period of the time-varying temperature.

Time-varying delays (green solid lines) corresponding to various time-varying temperature T (t) = ΔT sin(ωt) + T₀ (red dashed lines). Parameter values here are θ = 4500K, E = 13.5 min., ΔT = 6°C, T₀ = 36°C, and δ_p = .28. (a) $\omega =\frac{2\pi }{10}$. (b) $\omega =\frac{2\pi }{30}$. (c) $\omega =\frac{2\pi }{50}$.