Hey guys before going through this lecture, first of all you should clear your concepts of surface tension. That's why I recommend you to go through Lecture - 5 first.Pressure inside a liquid droplet Here, we will calculate gauge pressure (Pgauge ). Gauge pressure is the pressure measured by considering that the atmospheric pressure is zero. We will have a detailed discussion on all types of pressure in my upcoming lectures. Let me clear one thing that there is a difference between a water droplet and bubble. Water droplet is filled with water from inside and outside atmosphere is present whereas in bubble inside the liquid film also air is present and of course outside of liquid film of bubble air is present. Remember we are considering atmospheric pressure is zero. On The Water droplet two forces are acting one is constructive force and other is destructive force. Water droplet is formed with the equilibrium of both these forces. Pressure from inside of water droplet will try t…