Fisika Dasar II (PAF 08112) Mukhtar Effendi.

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1 Fisika Dasar II (PAF 08112) Mukhtar Effendi

2 Gelombang Tali dan Gelombang Bunyi Efek Dopler Prinsip Superposisi:
GBPP Gelombang Mekanik: Persamaan Gelombang Gelombang Berjalan Gelombang Tali dan Gelombang Bunyi Efek Dopler Prinsip Superposisi: Gelombang Berdiri Pelayangan Interferensi Listrik Statik: Muatan Listrik dan Gaya Coulomb Hukum Gauss Potensial Listrik Kapasitor dan Dielektrik Elektrodinamika: Arus Listrik Rangkaian Listrik Sederhana Rangkaian RC Magnetostatik: Bahan Magnetik Gaya Lorentz Hukum Biot-Savart Hukum Ampere Induksi dan Hukum Faraday: Induktansi Rangkaian RL Mukhtar Effendi Fisika Dasar II

3 Osilasi Elektromagnetik: Rangkaian LC Arus Bolak-Balik Rangkaian RLC
GBPP Osilasi Elektromagnetik: Rangkaian LC Arus Bolak-Balik Rangkaian RLC Gel. El. Mag.: Persamaan Maxwell (1) Gelombang datar Elektromagnetik Spektrum Gelombang ELektromagnetik Polarisasi, Interferensi dan Difraksi Gelombang ELektromagnetik D. Halliday, R. Resnick and K. Krane, 1992, Physics 4th edition, John WIley & SOns. D.C. Giancoli, 1995, Physics, Principle with application, Int. Edition, Prentice Hall Mukhtar Effendi Fisika Dasar II

4 Waves are disturbances which propagate (move) through a medium.
Mechanic waves What are waves? Waves are disturbances which propagate (move) through a medium. Note: Light is a special case, it exhibits wave-like properties but does not require a medium through which to propagate. A single peak or trough we call a pulse. A wave consists of a train of pulses. A single peak or trough we call a pulse. A wave consist of a train of pulses. Mukhtar Effendi Fisika Dasar II

5 Characteristic of waves 1. Amplitude
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6 2. Wavelength Mukhtar Effendi Fisika Dasar II

7 3. Period 4. Frequency Mukhtar Effendi Fisika Dasar II

8 5. Speed Mukhtar Effendi Fisika Dasar II

9 Two types of waves Transverse waves Longitudinal waves
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11 Properties of Waves 1. Reflection Mukhtar Effendi Fisika Dasar II

12 If it slows down it turns towards the perpendicular.
2. Refraction If the wave speeds up in the new medium it turns away from the perpendicular to the medium surface. If it slows down it turns towards the perpendicular. Mukhtar Effendi Fisika Dasar II

13 3. Interference Mukhtar Effendi Fisika Dasar II

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15 4. Difraction (Pembelokan lewat celah sempit) 5. Dispersion Dispersion is a property of waves where the speed of the wave through a medium depends on the frequency. So if two waves enter the same dispersive medium and have different frequencies they will have different speeds in that medium even if they both entered with the same speed. Mukhtar Effendi Fisika Dasar II

16 Persamaan Gelombang Sinus
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17 Tentukan beda fase  dan tuliskan persamaan gelombang tersebut.
Sebuah gelombang sinus berjalan dalam arah x positif memiliki amplitudo 15 cm, panjang gelombang 40 cm dan frekuensi 8 Hz. Pergeseran dalam arah vertikal pada saat x=0 dan t=0 sejauh 15 cm. (Seperti terlihat pada gambar). Berapakah bilangan gelombang k, periode T dan frekuensi sudut  dan kecepatan gelombang v? Tentukan beda fase  dan tuliskan persamaan gelombang tersebut. Mukhtar Effendi Fisika Dasar II

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20 Superposisi dan Interferensi Gelombang Sinus
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22 When y1 and y2 are in phase, the result is constructive interference.
The superposition of two identical waves y1 and y2 (blue) to yield a resultant wave (red). When y1 and y2 are in phase, the result is constructive interference. When y1 and y2 are  rad out of phase, the result is destructive interference. When the phase angle has a value other than 0 or  rad, the resultant wave y falls somewhere between the extremes shown in (a) and (b). Mukhtar Effendi Fisika Dasar II

23 Sebuah gelombang dinyatakan dengan persamaan y=…; k=2,11 rad/m, w=3,62 rad/s, x dalam meter t dalam detik. Tentukan amplitudo, panjang gelombang, frekuensi dan kelajuan gelombang. Mukhtar Effendi Fisika Dasar II

24 Sebuah gelombang sinus dinyatakan dengan persamaan y=…; k=3,10 rad/cm, w=9,30 rad/s. Berapa jauhkah sebuah titik dalam gelombang berpindah dalam 10 s. Mukhtar Effendi Fisika Dasar II

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28 Electric field + magnetic field
Electromagnetic wave Electric field + magnetic field Mukhtar Effendi Fisika Dasar II

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