π¬πππ π¨πππππππ | π’ππ π¨π©πͺπππ£π© π©Ί
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Ω Ψ³Ψ§ΨΨ© Ψ΅ΩΩΨΉΨͺ ΩΩΩ Ψ·Ψ§ΩΨ¨ Ψ·Ψ¨ ΩΨ¨ΨΨ« ΨΉΩ Ψ§ΩΨΉΩΩ Ψ Ψ§ΩΨͺΨ·ΩΨ±Ψ ΩΨ§ΩΨ§Ψ³ΨͺΩ Ψ±Ψ§Ψ± Ψ±ΨΊΩ Ψ§ΩΨͺΨΉΨ¨. π©΅ ΩΨ³Ψ£Ω Ψ§ΩΩΩ ΨΉΩΩ ΩΨ§ ΩΨ§ΩΨΉΩΨ§Ψ ΩΩΩΨ¨ΩΨ§ Ψ«Ψ§Ψ¨ΨͺΩΨ§Ψ ΩΨͺΩΩΩΩΩΨ§ ΩΨ§ ΩΩΩΨ·ΨΉ π
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Ω
ΩΩ
ΩΩ Ω ΩΩΩΩ
ΩΩΨ±Ψ© Ψ§ΩΨ²ΩΨ² Ψ΄ΩΩΩΩΩ
π
stationary police car uses a radar gun cmitting waves at frequency f. A car is moving away from the police car. The frequency of the waves detected by the police car's receiver will be:
#ΩΩΨͺΨ°ΩΩΨ± π
Normal to = perpendicular = ΨΉΩ
ΩΨ―Ω π
In the transverse wave, the particles in the medium move.... to the direction of the wave propagation.
ΩΩΨΉΩ Ψ¨Ψ§ΩΩΩπ©΅π©΅.
Ω Ψ§ΩΨ¬Ψ²Ψ¦ΩΨ© ΩΩΩ Ψ¨ΩΩΨ±ΩΩΨ§ Ψ§ΩΩΩΩ
: Ψ¬Ψ²Ψ¦ΩΨ© Ψ§ΩΩΩΩΩΨ© ΩΩΩΨ§ Ω
ΨΉ Ψ§ΩΨ§Ψ³Ψ¦ΩΨ© ( Ψ΄ΩΨͺΨ§Ψͺ Ω
.ΩΨ±Ψ§Ψ³ 14-15-16 ) β€οΈ
Ω ΩΨΉΨͺΨ¨Ψ± Ψ₯ΩΨ¬Ψ§Ψ² ΩΨ¨ΩΨ± ΩΩΨ¨Ψ§ ΩΩ ΩΩ
ΩΩΨ§ Ψ§ΩΩΩΩΩΨ© Ψ§ΩΩΩΩ
Ψ ΨΩΩΨΉΨ― ΨΊΨ―ΩΨ§ ΩΩΩX-ray Ω Ψ§Ψ³Ψ¦ΩΨ© Ψ³ΩΩΨ§Ψͺ ΩΩΩΨΉΨ― ΨͺΩΨ§ΨͺΨ© Ψ§ΩΨ§Ω
ΩΩΨ―Ψ±ΩΨ§ ΩΨ±Ψ§Ψ¬ΨΉΩΨ§ ΩΩΩΩ
Ω
Ψ±Ψ© ΨͺΨ§ΩΩΨ©Ψ Ψ¨ΩΩΩ Ψ§ΩΩΩ Ω
Ψ§Ψ±Ω Ω
ΨΆΩ
ΩΩ Ψ¨Ψ₯Ψ°Ω Ψ§ΩΩΩ π
ΩΩΩΩ Ω
ΨΉ Ψ³Ψ§ΨΉΨ© 11 ΨΩΩΩΩ ΩΩ ΩΩΩΨ² Ψ§Ω Ψ΄Ψ§Ψ‘ Ψ§ΩΩΩ Ψ Ω
ΩΩΩΩΩ π€
ΩΩ ΨΉΩΨ―ΩΩ
Ψ§Ω Ω
ΩΨ§ΨΨΈΨ§Ψͺ ΨΉΩΩ Ψ·Ψ±ΩΩΨ© Ψ§ΩΨ§Ψ³Ψ¦ΩΨ© Ψ§Ω Ψ§Ω Ψ΄ΩΨ‘ ΨͺΨ§ΩΩ Ψ Ψ§Ψ¨ΨΉΨͺΩΩΩ ΨΉΩΩ Ψ΅Ψ§Ψ±ΨΩΩ Ω ΩΨΨ§ΩΩ ΩΨΉΨ―ΩΩΨ§ Ψ¨Ψ₯Ψ°Ω Ψ§ΩΩΩ π€
ΩΩΩ ΨͺΩΨ±ΩΨ¨Ψ§ Ψ¨ΨΉΨͺΨͺ Ψ§ΩΩ
Ψ§ΩΨ§Ψ³Ψ¦ΩΨ© ΩΩΩ Ψ¬Ψͺ ΩΩ Ψ§ΩΨ§Ω
ΨͺΨΨ§ΩΨ§Ψͺ Ω ΩΩΩ ΩΩ
ΩΩ ΨͺΨ¬Ω Ψ Ψ―ΩΨ±ΩΨ§ Ψ―ΩΨ±Ψ© ΨΉΩΩ Ψ§ΩΩ
Ψ³Ψ§Ψ¦Ω ΩΨ§Ω Ω
Ψ§ Ψ―Ψ±ΨͺΨ΄ ΩΩΨ¨Ψ§ ΩΩ Ψ§ΩΩΩΩΨ² Ψ ΩΩ ΩΩΩ ΨΨ§Ψ¬Ψ© Ω
ΩΩ
Ψ© ΩΨ³ΩΨͺΩΨ§ ΨΩΨ¨ΨΉΨͺΩΨ§ ΨΊΨ―ΩΨ§ Ψ¨Ψ₯Ψ°Ω Ψ§ΩΩΩ β€οΈ
ΩΩΩΩΩ
Ψ§ΩΩΩ ΩΨ³Ψ―ΩΨ―ΩΩ
. π©΅
Which one of the following statements about diagnostic ultrasound is FALSE?
Which one of the following harmonics does NOT exist in a closed-end air column?
Which one of the following statements about standing waves is CORRECT?
Which one of the following is considered an application of the Doppler effect?
The main causes of attenuation of ultrasonic waves in tissues are:
The sound intensity level is measured in:
The other natural frequencies of a vibrating system besides the fundamental frequency are called:
A sound wave has an intensity of 1Γ10^-6 W/m2 . What is its intensity level in decibels?
(Reference intensity lo=1x10^-12 W/m2)
