So, therefore, there cannot be an abrupt change is change in velocity across the disc. Do you understand me? There cannot be an abrupt change in velocity. There will be a gradual change in velocity, no doubt, but there cannot be an abrupt change in velocity. Now, you see here, if the velocity was V A here, what would be the velocity at the disc? See this pressure, it is reducing. Therefore, velocity will go on increasing till the disc; also beyond the disc, there will be a slight increase in velocity because drop in pressure, and across the disc, velocity will be constant. There will be no change in, abrupt change in velocity here.