1. Electromagnetic Waves

2. Fields are perpendicular to each other and perpendicular to propagation of wave (transverse)

3. Full Spectrum

5. Waves c2 = 1/(εo μo) How far is one Light year? v = f λ
v = c = 3 x108 m/s
c2 = 1/(εo μo)
How far is one Light year?

6. Energy Density Electric energy density = ½ εo E2
Magnetic energy density = 1/(2 μo) *B2
Total energy density
μ = ½ εo E2 + 1/(2 μo) *B2

7. Intensity S = Power/Area (W/m2) S = ½ c εo E2 + c/(2 μo) *B2

8. Doppler Effect fo = fs (1 +/- vrel/c ) vrel << ct
+ toward, - away
An airport radar emits a signal with a frequency of 8 x109 Hz, what frequency does an inbound airplane travelling at 200m/s observe? What frequency does the radar station observe returning from the airplane?