1. Frequencies and Wavelengths f: (Hz) :(m)Relevant Dim:  1300M  1030M  1003M Earth Diam.   1 k300k  10 k30 k Mnt. Everest  100 k3 k Radio Waves

2. Frequencies and Wavelengths f: (Hz) :(m)Relevant Dim: 1M300mRedwool Tree 10M30m 100 M3m 1G300mmHydrogen Line 10 G30mm 100 G3mm Radio Waves

3. Frequencies and Wavelengths f: (Hz) :(m)Relevant Dim: 1T300  mBacterium 10T30  m 100 T3  m Infrared 1P300  mVirus Visible 10P30  m UV 100P3  m X-Rays

4. Frequencies and Wavelengths f: (Hz) :(m)Relevant Dim: 1E300  mAtomX-Rays 10E30  mX-Rays 100 E3  mGama Rays 110 21 300  mGama Rays 1010 21 30  mGama Rays 100 10 21 3  mGama Rays

5. Radio Frequency Band Names Name:Freq:Use: ELF3-30 Hz SLF30-300 HzPower Grids ULF300-3000 Hz VLF3-30 kHzSubmarines LF30-300 kHzBeacons MF300-3000 kHzAM Broadcast

6. Radio Frequency Band Names Name:Freq:Use: HF3-30 MHzShortwave VHF30-300 MHzFM, TV UHF300-3000 MHz TV, LAN, Cellular SHF3-30 GHz Radar, GS Sat, data EHF30-300 GHz Radar, Automotive

7. Problem What is light-year distance? 60 x 60 x 24 x 365 x 3.0 x 10 8 = 9.46 x 10 15 m

8. Metric Prefixes Value:Prefix:Pron:Symbol: 10 18 exaex aE 10 15 petapet aP 10 12 teratare aT 10 9 gigajig aG 10 6 megameg aM 10 3 kilokey lok 10 2 hectohek toeh 10dekadek ada

9. Metric Prefixes Value:Prefix:Pron:Symbol: 10 -1 decidec id 10 -2 centicent Ic 10 -3 millimill Im 10 -6 micromy kro  10 -9 nanonan o  10 -12 picopec o  10 -15 femtofem tof