presentasi gelombang elektromagnetik kelas x
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Tugas FisikaTRANSCRIPT
oo
c .
1
o = 8.85 x 10-12 C2/Nm2
o = 12.56 x 10-7 wb/amp.m
.fc C = kecepatan cahaya (3 x 108 m/s)
= Panjang Gelombang (m)1A0 = 10-10Hz
f = Frekuensi (Hz)1MHz = 106Hz
Gelombang elektromagnetik adalah gelombang yang tidak memerlukan medium dalam perambatannya.
Radiasi elektromagnetik adalah kombinasi medan listrik dan medan magnet yang berosilasi dan merambat lewat ruang dan membawa energi dari satu tempat ke tempat yang lain. Cahaya tampak adalah salah satu bentuk radiasi elektromagnetik.
Name Frequency &Wavelength Aplications
ELF3–30 Hz
100,000 km – 10,000 kmCommunication with submarines
SLF30–300 Hz
10,000 km – 1000 kmCommunication with submarines
ULF300–3000 Hz
1000 km – 100 kmCommunication within mines
VLF3–30 kHz
100 km – 10 km
Submarine communication, avalanche beacons, wireless heart rate monitors,
geophysic
LF30–300 kHz
10 km – 1 kmNavigation, time signals, AM longwave broadcasting, RFID
MF 300–3000 kHz
1 km – 100 mAM (Medium-wave) broadcasts
HF3–30 MHz
100 m – 10 m
Shortwave broadcasts, amateur radio and over-the-horizon aviation
communications, RFID
VHF30–300 MHz
10 m – 1 m
FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-
aircraft communications. Land Mobile and Maritime Mobile communications
UHF300–3000 MHz
1 m – 100 mm
television broadcasts, microwave ovens, mobile phones, wireless LAN, Bluetooth,
GPS and Two-Way Radios such as Land Mobile, FRS and GMRS Radios
= 10-3 - 10-1
S= S= jarak t= waktu (s)
= 1011 - 1014 m
=400 - 800n nm
- 10-7 m= 10-8
- 10-8 m= 10-11
= 10-5 m