Лаг1989 задача №21.18
A diffraction grating from a helium-filled discharge tube normally receives a beam of light. At what length of λ in the third-order spectrum is the red helium line (λ₁ = 706 nm) superimposed on the second-order spectrum?
Thank you for your purchase
Оплата и выдача товара осуществляются через партнёрскую платформу.