Planck's Constant Kit Manufacturer in Delhi


Mittal Enterprises

Mittal Enterprises

Planck's Constant Kit Objective: Determination of Planck's constant using light emitting diodes (LED's) by observing the 'reverse photo-electric effect'. Theory: If a bias voltage is passed across the LED, which is equal or greater than the difference in the energy of the bands, i.e. the barrier potential, then the bands will 'line up' and a current will flow. When current flows, electrons flow from the conduction band of the N type conductor and are forced up into the conduction band of the P type. Since the P type conductor's valance band is lacking in electrons and we are overpopulating its conduction band with the bias voltage the electrons readily fall into the 'holes' in the valance band of the P type conductor. When they fall, this energy is released in the form of a photon. The energy of the photon emitted can be written as: Where h is Planck’s constant and v is its frequency. The energy of one electron is the charge of an electron (i.e. the current flow of one electron per second in amps) times the voltage. Using this knowledge we then form the equation: where e = 1.6 x 10-19 C (electron charge) We then solve equation (1) for h and replace the E term with the equivalent of E in equation (2), as well as replace with: Where c = 3 x 108 m/sec (speed of light) We then get: or this equation can be rewritten as It is this equation that we will use to determine Planck's constant. The Setup facilitates determination of Planck's Constant (h) by measuring the voltage drop across light-emitting diodes (LEDs) of different colors at a constant current. Current is chosen such that bulk resistance of the LED is neglected. A graph of V vs. λ-1 is plotted and its gradient gives the value of Planck's Constant as per equation (5). Planck’s Constant Kit consists of the following parts: Specially designed variable dc power supply (0 – 5 V) whose output can be varied in steps of 1 mV. Digital dc Micro ammeter (0-999 µA dc), Digital Voltmeter (0 – 9.99V dc), Calibrated LEDs: 4 nos



Dielectric Constant Kit Manufacturer in Delhi

Objective: Determination of dielectric constant of solids Theory: A dielectric is a material having low electrical conductivity in comparison to that of a metal. It is characterized by its dielectric constant. Dielectric constant is measured as the ratio of the capacitance C of an electrical condenser filled with the dielectric to the capacitance C...




Curie Temperature Kit For Ferroelectric in Delhi

Objective: Determination of dielectric constant of PZT material with Temperature variation and thus determining Curie Temperature. Theory: Ferro-electricity usually disappears above a certain temperature called the transition (or Curie) temperature. Knowledge of the Curie temperature and the variation of the dielectric constant below and above the...




Planck's Constant Kit Manufacturer in Delhi

Planck's Constant Kit Objective: Determination of Planck's constant using light emitting diodes (LED's) by observing the 'reverse photo-electric effect'. Theory: If a bias voltage is passed across the LED, which is equal or greater than the difference in the energy of the bands, i.e. the barrier potential, then the bands will 'line up' and a c...




Ultrasonic Interferometer For Solids in Delhi

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Ultrasonic Interferometer For Liquids in Delhi

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Nano Fluid Interferometer Manufacturer in Delhi

OBJECTIVE 1.Characterization of Nanofluids like Ag/Au & Ferrofluids etc. 2. To evaluate modest nanoparticles concentration in the fluid for significant enhancement of its property. 3. Prediction of enhanced thermal conductivity due to suspension of the metallic nanoparticles with very low concentration in to the polymeric fluids. 4. Sound Veloci...




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Planck's Constant Kit Objective: Determination of Planck's constant using light emitting diodes (LED's) by observing the 'reverse photo-electric effect'. Theory: If a bias voltage is passed across the LED, which is equal or greater than the difference in the energy of the bands, i.e. the barrier potential, then the bands will 'line up' and a current will flow. When current flows, electrons flow from the conduction band of the N type conductor and are forced up into the conduction band of the P type. Since the P type conductor's valance band is lacking in electrons and we are overpopulating its conduction band with the bias voltage the electrons readily fall into the 'holes' in the valance band of the P type conductor. When they fall, this energy is released in the form of a photon. The energy of the photon emitted can be written as: Where h is Planck’s constant and v is its frequency. The energy of one electron is the charge of an electron (i.e. the current flow of one electron per second in amps) times the voltage. Using this knowledge we then form the equation: where e = 1.6 x 10-19 C (electron charge) We then solve equation (1) for h and replace the E term with the equivalent of E in equation (2), as well as replace with: Where c = 3 x 108 m/sec (speed of light) We then get: or this equation can be rewritten as It is this equation that we will use to determine Planck's constant. The Setup facilitates determination of Planck's Constant (h) by measuring the voltage drop across light-emitting diodes (LEDs) of different colors at a constant current. Current is chosen such that bulk resistance of the LED is neglected. A graph of V vs. λ-1 is plotted and its gradient gives the value of Planck's Constant as per equation (5). Planck’s Constant Kit consists of the following parts: Specially designed variable dc power supply (0 – 5 V) whose output can be varied in steps of 1 mV. Digital dc Micro ammeter (0-999 µA dc), Digital Voltmeter (0 – 9.99V dc), Calibrated LEDs: 4 nos

Dielectric Constant Kit Manufacturer in Delhi

Dielectric Constant Kit Manufacturer in Delhi

Objective: Determination of dielectric constant of...

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Curie Temperature Kit For Ferroelectric in Delhi

Curie Temperature Kit For Ferroelectric in Delhi

Objective: Determination of dielectric constant of...

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Planck's Constant Kit Manufacturer in Delhi

Planck's Constant Kit Manufacturer in Delhi

Planck's Constant Kit Objective: Determination...

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Ultrasonic Interferometer For Solids in Delhi

Ultrasonic Interferometer For Solids in Delhi

Ultrasonic Interferometer For (Solids) Non-Des...

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Ultrasonic Interferometer For Liquids in Delhi

Ultrasonic Interferometer For Liquids in Delhi

Ultrasonic Interferometer For Liquids Using th...

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Nano Fluid Heat Capacity Apparatus in Delhi

Nano Fluid Heat Capacity Apparatus in Delhi

Nano Fluid Heat Capacity Apparatus The Specifi...

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Nano Fluid Interferometer Manufacturer in Delhi

Nano Fluid Interferometer Manufacturer in Delhi

OBJECTIVE 1.Characterization of Nanofluids like Ag...

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Mittal Enterprises



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Mittal Enterprises

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Mittal Enterprises

2151/T-7C, New Patel Nagar, Delhi, 110008 India, New Delhi, India



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