Shown is a person stationary in their frame of reference watching a moving cart. On the moving cart is a second person who remains stationary on the cart in their frame of reference. The cart is moving with velocity=v. The person on the cart throws a baseball with velocity=0.5v in the frame of reference of the cart.

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?