Planck’s Constant LED Apparatus

Code: EPC7000

A multipurpose unit that allows the user to easily calculate Planck’s constant, to measure the wavelength of coloured light, demonstrate colour light transmission through colour filters and show the diffraction patterns for various wavelengths of coloured light using a range of 4 LEDs (Red, Yellow, Green and Blue) covering the light range from deep blue at 470nm to near IR at 940nm.

Description

Box mounted with 5 x 4mm sockets for attachment to an ammeter or voltmeter to display measurements. Monitoring the voltage of each LED a graph of energy input as a function of light frequency emitted can be measured with an approximate value of Plank’s constant calculated.

  • Supplied with 500 lines/mm diffraction grating
  • Designed and manufactured in the UK

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SettingsPlanck's Constant LED Apparatus removeAC Magnetic Field Coil removeLamp Brightness Experiment removeDual Output PSU (12VAC/12VDC) removeCapacitance Substitution Box Class set of 15 removeBERT - Battery Electrical Resistance Tester remove
NamePlanck's Constant LED Apparatus removeAC Magnetic Field Coil removeLamp Brightness Experiment removeDual Output PSU (12VAC/12VDC) removeCapacitance Substitution Box Class set of 15 removeBERT - Battery Electrical Resistance Tester remove
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Description

Code: EPC7000

A multipurpose unit that allows the user to easily calculate Planck's constant, to measure the wavelength of coloured light, demonstrate colour light transmission through colour filters and show the diffraction patterns for various wavelengths of coloured light using a range of 4 LEDs (Red, Yellow, Green and Blue) covering the light range from deep blue at 470nm to near IR at 940nm.
AC Magnetic Field Coil

Code: ELB8000

Students often think that the brightness of a lamp is only dependent on the current flowing through it. The unit allows the teacher to safely switch a 12V lamp in series with a mains lamp and study the current flow through them.  

Code: IPC-1402-P

This instrument (IPC-1402-P) is designed as a general purpose laboratory power supply. It has two isolated outputs which operate independently of each other. The AC output is selected by means of a 4-position switch on the front panel. Selected voltages are 2, 4, 6 and 12V at 4A continuously, or up to 5A for periods of 1 hour. The output is supplied via a pair of 4mm sockets on the front panel colour coded white. The output is protected from overload or short circuit by a current sensing circuit breaker mounted on the front panel. The DC output is smoothed and regulated and is continuously variable from 0V to 12V at currents up to 3A. Voltage ripple typically less than 50mV. The output is supplied via a pair of 4mm sockets on the front panel colour coded red (positive) and black (negative). The output is protected from short circuit or overload by an electronic regulator. The outputs may be used simultaneously as long as the combined load does not exceed 3A. Power on is indicated on the front panel by a green LED. An illuminated on/off switch is mounted on the rear panel adjacent to a fused IEC mains inlet. Enclosed in a robust metal case with a durable powder coated finish. Supplied with detachable mains lead and instructions. A pair of graphs showing how the output voltage of this power supply varies as the current supplied is increased is included in the instruction leaflet for this instrument.

Code: IPC-5865-X

Class set of 15 Capacitance Substitution Boxes. The IPC Capacitance Substitution Box (IPC-5861-X) provides the easily selection of 12 preferred value capacitors, ranging from 100pF to 0.47µF. The values range from: 100pF, 220pF, 470pF, 1nF, 2n2, 4n7, 10nF, 22nF, 47nF, 0.1µF, 0.22µF and 0.47µF. All the capacitors offer a maximum voltage rating of 50V (AC or DC), with actual capacitance value tolerances of ±5% to ±10%. The unit is housed in a robust ABS plastic case with rotary selector switch and a pair of 4mm connection sockets.

Code: EBR5010

BERT is a simple way of introducing electrical resistance and resistivity to a class. It consists of a circuit board that may be drawn on using the supplied pencil. Connecting the two sides of the board together by a pencil line gives a conducting track and the LED lights. The brightness of the LED gives an indication of the resistance of the path.  Drawing the line thicker decreases the resistance, as does shortening the path. Resistances in parallel may be studied and a “volume control” simply made.   BERT may also be used to test various materials to see whether they are conductors or insulators. Liquids and pastes may also be tested.  The conductivity of the class may be studied as well as how a switch works.  When you are finished the pencil lines may be removed with the supplied eraser.
ContentBox mounted with 5 x 4mm sockets for attachment to an ammeter or voltmeter to display measurements. Monitoring the voltage of each LED a graph of energy input as a function of light frequency emitted can be measured with an approximate value of Plank's constant calculated.
  • Supplied with 500 lines/mm diffraction grating
  • Designed and manufactured in the UK

Code: IPC-4915-W

AC Magnetic Field Coil
This includes kit includes the use of a safety mains lamp socket, which has a built in a switching system that only allows it to be switched on when a lamp is inserted.  We have also included two switches, which must be pressed simultaneously to route the mains current through the low voltage lamp. Furthermore, the switches are sited at opposite ends of the case, requiring two hands to operate them.  However, it must be appreciated that you are working with potentially lethal voltages and currents and therefore extra care should be taken.
  • Supplied with 1 x 240V 100W lamp and 1 x 12V 5W lamp and mains power lead.
Description: Dual Output PSU (12VAC/12VDC) Part Number: IPC-1402-P Electrical Supply: 220-240VAC, 50-60Hz Dimensions: 179 x 190 x 85mm overall Mass: 2.9kg AC Output Voltage Range: 2, 4, 6 and 12VAC Maximum AC Output Current: 4A (5A upto 1 hour) DC Output Voltage Range: 0 to 12VDC Maximum DC Output Current: 3A
Description : Capacitance Substitution Box                    Part Number : IPC-5861-X                                               Electrical Supply : 50VAC/DC Maximum                         Dimensions : 75 x 100 x 40mm                                            Mass : 0.15kg                                          Capacitance Tolerance : ±5% to ±10%                                                                          Electrical Connections : 4mm Sockets
A stunningly effective way of teaching the basics of electrical resistance. The kit comprises of: 
  • 1 x BERT circuit board
  • 1 x PP3 battery
  • 1 x 3B pencil
  • 1 x crocodile clip connecting lead
  • 1 x eraser
  • 1 x full set of teaching notes.
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