Calculation results for Case I: L₀ = 10⁴⁷ erg s^-1, M_ej = 10^-4M_⊙, ξ = 0.5, p = 2.3. a) The evolution of the Lorentz factor of the blast wave with different values of σ as labeled. b) The break frequencies ν_a (dotted), ν_m (solid), and ν_c (dashed) of the reverse shock emission. The three dashed to dotted lines mark the X-ray, optical (R), and radio (10 GHz) bands, respectively. c) Light curves of the reverse shock in X-ray, optical (R), and radio (10 GHz) bands. d) The solid lines represent the reverse shock light curves for σ = 0.1 and the dashed lines are light curves for the forward shock. In panels a)−c) the blue, magenta, and dark yellow lines represent σ = 0.1,1, and 10, respectively. In panel d), we can obtain that in Case I the reverse shock emission is stronger than the forward shock emission. It can be seen that the X-ray flux lasts for several tens of seconds, while the optical flux maintains a high level until the spin-down time T_sd, and then the radio emission becomes dominant.