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Study of Plancks Constant by means of LED

Study of Plancks Constant by means of LED
Study of Plancks Constant by means of LED
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Product Code : JLab1040
Brand Name : JLab
Price And Quantity
  • Minimum Order Quantity
  • 1 EA
Product Description

Study of Planck’s Constant by means of LED

Several proposals to measure the Planck’s Constant for didactical purposes, using the current-voltage (I-V) characteristics of a light emitting diode (LED) have been made quite regularly in the last few years. The physical interpretation however is not completely clear and this has raised many discussions, which have been published almost with same regularity as the proposals themselves.
                            I=I exp [-e(V -V)/ hkT]
Where, e is electronic charge, k is Boltzmann constant, T is absolute temperature and h is material constant which depends on the type of diode, the location of recombination region, etc.

i) Dependence of current (I) on temperature (T) at constant applied voltage (V)
The following facilities are built in for this

Current Meter
• A highly stable current source with 3½ digit display.
• Range : 0-2µAwith resolution of 1 µA

Oven, PCO-01
• It is a small temperature controlled oven with built-in RTD sensor.
• Temperature adjustable from ambient to 338K
• Digital display of temperature
• High stability 1K

Variable Voltage Source (0-2V)
• A high stability voltage source with 3½ digit display

ii). Material Constant
To draw I-V characteristics of LED for determination of h, a variable voltage source and a current meter are provided with 3½ digit display.

iii) The wavelength l of light emitted by LED
These are taken from LED datasheet or measured by a transmission grating, and are provided with the set of LED’s.



Trade Information
  • FOB Port
  • Mumbai
  • Payment Terms
  • Paypal, Western Union, Telegraphic Transfer (T/T), Letter of Credit at Sight (Sight L/C), Letter of Credit (L/C), Delivery Point (DP), Days after Acceptance (DA), Cash Advance (CA), Cash on Delivery (COD), Cash Against Delivery (CAD)
  • Supply Ability
  • 1000 EA Per Week
  • Delivery Time
  • 7 Days
  • Sample Available
  • Yes
  • Sample Policy
  • If order is confirmed we will reimburse the sample cost
  • Packaging Details
  • Packed in a case.
  • Main Export Market(s)
  • Africa, Middle East, Western Europe, Eastern Europe, South America, North America, Central America, Australia, Asia
  • Main Domestic Market
  • All India
  • Certifications
  • ISO 9001, ISO 14001, CE
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