ISO 9001:2015Made in INDIA


Malus Law Apparatus
Model: HO-ED-P-02
Price : $ 642.00

Holmarc's Malus Law Apparatus (Model No: HO-ED-P-02) helps to understand polarization properties of light. It can also be used to study the light intensity relation of polarizer-analyzer. This apparatus comprises of a diode laser (as a light source), a polarizer, an analyzer assembly and a pinhole photo detector with output measurement unit.

In this experiment, Malus law of polarization is verified by showing that the intensity of light passed through two polarizers depend on the square of cosine value of the angle between the two polarizer axis. Laser light is used in this experiment because it’s wavelength is almost completely extinguished by the crossed polarizers.

The laser beam travelling through a polarizer is observed as a function of the orientation of the polarizer. With a second polarizer (called analyzer) the relative orientation of the polarizers is determined. The transmitted light is measured by a photo detector and the Malus Law can be verified.

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   Verification of Malus law

When completely plane polarized light is incident on the analyzer, the intensity I of the light transmitted by the analyzer is directly proportional to the square of the cosine of angle between the transmission axes of the analyzer and the polarizer ie,

I ∞ cos2θ

   To study the polarization properties of light

A graph between the orientations of the light intensity with respect to angle of transmission axis of the analyzer will follow the cos² θ function.

Scope of Supply

Optical Rail

Model No: ED-P-02-OR
Length : 500 mm
Material : Black anodized Aluminum alloy
Quantity : 1 no.

Kinematic Laser Mount

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

Polarizer Rotator with Mount

Model No: ED-P-02-PRM
Material : Sheet Polarizer
Rotation : 360 degree
Resolution : 1 degree
Quantity : 2 nos.

Detector Mount

Model No: ED-P-02-DM
Material : Black anodized Aluminum alloy
Diameter : 30 mm
Quantity : 1 no.

Diode Laser with Power supply (Red)

Model No: ED-P-02-DLPR
Wave length : 650 nm
Optical power : 3 mW
Quantity : 1 no.

Detector Output Measurement Unit

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


Instruction 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

Get in Touch

    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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