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Acoustics


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Screen Based Apparatus for Ultrasonic Diffraction
Acousto optic effect
Model: HO-ED-A-01A
Price : 
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The Ultrasonic diffraction apparatus is used to study diffraction of light by ultrasonic waves. Ultrasonic sound refers to sound with a frequency greater than the human audible range (20Hz to 20 KHz). When an ultrasonic wave propagates through a medium, the molecules in that medium vibrate over very short distance in a direction parallel to the longitudinal wave. The apparatus consists of a graduated rail and rail carriages appropriately fitted with a laser head, an RF oscillator, a glass tank mount with crystal holder and a screen.

The ultrasonic waves generated by the transducer travels down the medium (liquid)and gets reflected at the bottom (flat glass plate) of the cell. The incident and reflected waves interfere and a stationary / standing wave pattern is formed. The pattern can be observed on a screen or a wall and we can plot diffraction pattern on a graph paper for further calculations.

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Experiment

   To find the velocity of ultrasonic wave in liquids

The velocity of ultrasonic wave in a liquid,

V   =   ʋ ʌ

Where υ is the frequency of the crystal oscillator and Λ is the wavelength of ultrasonic wave.

We have,

Λ   =   n λ / Sin θ

Where n is the order of diffraction, λ is the wavelength of the laser used and θ is the angle of diffraction.

θ   =   tan-1 ( D / L )

D is the order length and L is the distance measured from the crystal oscillator to the detector.

   To find the bulk modulus of the given liquid

The bulk modulus of the liquid,

β   =   ρV2

Where ρ is the density of the liquid and V is the velocity of the ultrasonic wave.

   To find the compressibility of the liquid

The compressibility of a liquid is the reciprocal of bulk modulus,

K   =   1 / ρV2

Where ρ is the density of the liquid and is V the velocity of the ultrasonic wave.

Scope of Supply

Optical Rail

Model No: ED-A-01A-OR
Length : 500mm
Material : Aluminum alloy
Finish : Black anodized
Quantity : 1 no.

Kinematic Laser Mount

Model No: ED-A-01A-KLM
Adjustments : Using 80 tpi lead screws
Adjustment Range : +/-4 degrees
Material : Aluminum alloy
Finish : Black anodized
Quantity : 1 no.

Glass tank Mount with Crystal Holder

Model No: ED-A-01A-GMCH
Adjustments : Using 80 tpi lead screws
Material : Aluminum alloy
Finish : Black Anodized
Quantity : 1 no.

Screen

Model No: ED-A-01A-S
Material : Acrylic
Dimension : 300 x 200 mm
Quantity : 1 no.

Glass Tank

Model No: ED-A-01A-GT
Material : Float
Dimension : 50 x 35 x 35 mm
Quantity : 2 nos.

Piezo Electric Crystals

Model No: ED-A-01A-PEC
Frequency : 3, 5 MHz
Quantity : 1no. each

RF Oscillator

Model No: ED-A-01A-RFO
Frequency Range : 2 - 6 MHz
Quantity : 1no.

Diode Laser with Power supply (Red)

Model No: ED-A-01A-DLPR
Wave length : 650 nm
Optical power : 3 mW
Quantity : 1 no.

Accessories

Test Sample
Connecting Cables
Instruction Manual

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Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.

ISO 9001:2015 Made in INDIA

CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ

Get in Touch

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   +91 920-719-7772 / 6 / 1
   sales@holmarc.com
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