1 Shock waves emitted at the collapse of a laser-induced cavitation bubble in the vicinity of a free surface = Sóng xung kích sinh ra tại thời điểm nổ bóng khí trong điều kiện có bề mặt thoáng gần kề / Nguyen Thi Phuong Thao, Tran Ngo // .- 2021 .- Số 06(49) .- P 54-57 .- 621

The observation was conducted using high-speed laser stroboscopic videography in photoelasticity mode. We showed the bubble contracted faster in the vertical direction and formed a flat bubble at the minimum contraction. At the collapse, the bubble emitted multiple shock waves. The dynamics of the bubble during contract phase and the emission of multi shock waves were discussed in details.