Sailing question!
wind detaches from the lifting side of the sail surface when
a. the sail is perfectly set
b. the angle that the wind must turn on the lifting side becomes too great.
c. the boat is at maximum speed
d. it doesn't. the wind follows the surface of the sail no matter what.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?