Three strings S₁, S₂ and S₃ have linear mass densities μ, 4μ and 16μ, respectively, and are connected in series as shown. A generator sends y = y₀ cos(ωt - kx) along S₁. Which statements are correct?

Select all that apply

• Option A

  At the first reflection from P: y = α₁y₀ cos(ωt + kx + π), where α₁ > 0.

• Option B

  At the first transmission through P: y = α₂y₀ cos(ωt - kx), where α₂ > 0.

• Option C

  At the first reflection from Q: y = α₃y₀ cos(ωt - kx + π), where α₃ > 0.

• Option D

  At the first transmission through Q: y = α₄y₀ cos(ωt - 4kx), where α₄ > 0.