Ga parallel-polarized electromagnetic wave impinges from medium 1 (µ1 = µ0, ε1 = 81ε0) to medium 2 (µ2 = µ0, ε2 = ε0).

(a) what is the critical angle?

(b) what is the brewster angle?

(c) if the incident angle is 60˚, find the reflection coefficient | ii| and the phase angle arg(ii)

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Which process is represented by the pv diagram? a. the isobaric process b. the isovolumetric process c. the isothermal process d. the adiabatic process