PHY 2049 Midterm: University of Florida PHY 2049 exam3spring13
Document Summary
The electric field of a plane electromagnetic wave is described by. Em i sin(kz + t). The direction of the wave is in the k direction. This direction should also be given by the poynting vector: This implies the direction of bm is j. The magnitude of bm is given by. The angles 1, 2, and 3 of the polarizing directions are measured counterclockwise from the positive direction of the y axis. The intensity is given by. We want to find 3=90 : sin . What is the solar radiation pressure in pascals (n/m2) on a dark patch of the. The radiation pressure for totally absorbed light is: pr. The time constant for lr circuits is = l / r. The solution for charging the circuit is i t( ) = i m. 1 e t / where i m = 1 e t / m = i i m.
