ISO 9001:2015Made in INDIA


Single Slit Diffraction and
Heisenberg’s uncertainty principle
Model: HO-ED-D-02A
Price : $ 877.00

Holmarc's Apparatus Model HO-ED-D-02A is meant for the study of diffraction patterns of single slits and to confirm Heisenberg’s uncertainty principle. Here, the diffraction pattern is closely studied using a detector mounted on a translation stage. The device consists of 1.2 meters long optical rail along with carriages and opto-mechanics. At one end of the rail, X-translation stage with detector is mounted and at the other end, laser is held on a kinematic mount. Linear scale attached to the rail makes length measurements easy and convenient.

In this apparatus, diffraction experiments using single slits are carried out with a photo sensitive detector and diode laser is used as light source. The diffraction slit is placed at a certain distance from the detector and the pattern is allowed to fall on the detector stage. The micrometer driven stage is used to move the detector to extreme end of the diffraction pattern and the intensity is noted at close intervals by traversing the detector through the cross section of the spectrum. The intensity versus distance curve is plotted on a graph for calculations. The results are evaluated both from the diffraction pattern viewpoint, and from the quantum mechanics stand- point to confirm Heisenberg's uncertainty principle. Thus this apparatus clearly reveals that the narrow slit produces a broader momentum distribution. This confirms the Heisenberg’s uncertainty principle in a single slit diffraction.

More +


   To observe the diffraction pattern and calculate the slit width
   To calculate the uncertainty of momentum from the diffraction patterns of single slits of differing widths and to confirm Heisenberg’s uncertainty principle

Scope of Supply

Optical Rail

Model No: ED-D-02A-OR
Length : 1200 mm
Material : Aluminum alloy
Finish : Black anodized
Quantity : 1 no.

Kinematic Laser Mount

Model No: ED-D-02A-KLM
Material : Anodized Aluminum alloy
Adjustments : Using 80 tpi lead screws
Adjustment Range : +/-4 degrees
Quantity : 1 no.

Cell Mount

Model No: ED-D-02A-CM
Material : Aluminum alloy
Finish : Black anodized
Diameter : 30 mm
Quantity : 1 no.

Diffraction Cells

Model No: ED-D-02A-DC
Single slit : 50, 100, 150, 200 & 250 micron
Diameter : 30 mm
Quantity : 1 No. Each

Detector Mount with linear translation stage

Model No: ED-D-02A-DMX
Material : Black anodized Aluminium alloy
Travel : Micrometer controlled
Resolution : 0.01 mm
Diameter : 30 mm
Quantity : 1 no.

Diode Laser with Power supply

Model No: ED-D-02A-DLPR
Wave length : 655 nm
Optical power : 3 mW
Colour : Red
Quantity : 1 no.

Detector Output Measurement Unit

Model No: ED-D-02A-DOMU
Sensor Type : Photo Transistor
Display : 7 segment, 3 ½ digit
Range : 0 - 199 milli / micro amperes
Quantity : 1 no.


User Manual


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

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    B.7., H.M.T. Industrial Estate H.M.T. P.O, Kalamassery, Kochi Kerala, India - 683 503
   +91 0484 2953780 / 0484 2953781
   Mon - Sat : 9 am to 5 pm

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