In a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 115.0 MHzMHz in opposite directions inside a narrow cavity with reflectors at both ends, causing a standing wave pattern to occur. A. How far apart are the nodal planes of the magnetic field? Answer in meters
B. If the standing wave pattern is determined to be in its eighth harmonic, how long is the cavity? Answer in meters

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?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?