If you have noticed tomato leaf spots and the lower leaves turning yellow, you may have tomato early blight alternaria. This tomato disease causes damage to the leaves, stems and even the fruit of the plant.Keep reading to learn more about what causes tomato early blight alternaria and how to treat leaf spot.he best treatment for tomato plant leaf spots is to make sure that you donât get it in the first place. Proper care of your tomato plants will make sure you avoid the dreaded yellow leaves and leaf spots that come with Alternaria Alternata.
A shock wave is a type of propagating disturbance. When a wave moves faster than the speed of sound in a liquid, gas or plasma (a fluid, in physics terminology) it is a shock wave.
Like an ordinary wave, a shock wave carries energy, and can propagate through a medium. It is characterized by an abrupt, nearly discontinuous change in pressure, temperature and density of the medium. In supersonic flows, expansion is achieved through an expansion fan. Unlike solitons (another kind of nonlinear wave), the energy of a shock wave dissipates relatively quickly with distance. Also, the accompanying expansion wave approaches and eventually merges with the shock wave, partially cancelling it out. Thus the sonic boom associated with the passage of a supersonic aircraft is the sound wave resulting from the degradation and merging of the shock wave and the expansion wave produced by the aircraft.