What are the similarities and differences between buoyancy and thrust?

Buoyancy - it is what perceive as the tendency of an object to rise when when it is submerged in a fluid it is can be defined as the ability of an object to float in the fluid .

Thrust - It is a reaction forced described quantitavely by newton third law

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

at right angles to each other