PASCO SE-6609 Instruction Manual
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PASCO SE-6609 Instruction Manual

Photoelectric effect apparatus
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Instruction Manual
Photoelectric Effect Apparatus
Equipment List
1.
2.
Included Equipment
1. Mercury Light Source Enclosure
2. Track, 60 cm
3. Photodiode Enclosure
4. Mercury Light Source Power Supply
5. DC Current Amplifier
6. Tunable DC (Constant Voltage) Power Supply
Optical Filters, Apertures, and Caps
7. Filter Wheel (365, 405, 436, 546, 577 nm)
8. Aperture Dial (2 mm, 4 mm, 8 mm diameter)
Photodiode Enclosure Cap (not shown)
Mercury Light Source Enclosure Cap (not shown)
Model No. SE-6609
4.
3.
5.
6.
11.
12.
10.
3.
8.
7.
012-13943B
10.
12.
11.

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Summary of Contents for PASCO SE-6609

  • Page 1 Instruction Manual 012-13943B Photoelectric Effect Apparatus Model No. SE-6609 Equipment List Included Equipment 1. Mercury Light Source Enclosure 2. Track, 60 cm 3. Photodiode Enclosure 4. Mercury Light Source Power Supply 5. DC Current Amplifier 6. Tunable DC (Constant Voltage) Power Supply Optical Filters, Apertures, and Caps 7.

  • Page 2: Limited Warranty And Limitation Of Liability

    13. Interface Cable (3) UI-5219 Recommended Equipment* Model PASCO 850 Universal Interface UI-5000 PASCO Capstone Software UI-5400 *See the PASCO web site at www.pasco.com for more information. Replacement Items* Model Replacement Mercury Lamp SE-6597 Replacement Photodiode Tube SE-6612 Limited Warranty and Limitation of Liability This Brolight product will be free from defects in material and workmanship for one year from the date of purchase.

  • Page 3: Electrical Symbols

    Safety Information 012-13943B Photoelectric Effect Apparatus • Do not use the equipment if it is damaged. Before you use the equipment, inspect the case. Pay particular attention to the insulation surrounding the connectors. • Do not use the equipment if it operates abnormally. Protection may be impaired. When in doubt, have the equipment serviced. •...

  • Page 4: Background Information

    About the Apparatus The SE-6609 Photoelectric Effect Apparatus consists of a mercury light source enclosure, a track, a tunable direct current (DC) constant voltage power supply, a DC current amplifier, a power supply for the mercury light source, miscellaneous cords and cables, a photodiode tube enclosure that has optical filters with five different frequencies and an aperture disk with three different diameters, and protective caps for the photodiode enclosure and the mercury light source enclosure.
  • Page 5 Principle of the Experiment 012-13943B Photoelectric Effect Apparatus In 1905 Albert Einstein gave a simple explanation of Lenard’s discoveries using Planck’s theory. The new ‘quantum’-based model predicted that higher frequency light would produce higher energy emitted electrons (photoelectrons), independent of intensity, while increased intensity would only increase the number of electrons emitted (or photoelectric current).

  • Page 6: Installation And Maintenance

    Photoelectric Effect Apparatus SE-6609 Installation and Maintenance Mercury Lamp Installation and Replacement CAUTION UV LIGHT: WHEN USING THIS PRODUCT, DO NOT LOOK INTO THE LAMP WHEN IT IS TURNED ON. UV RAYS MAY BE DANGEROUS. WEAR PROPER EYE AND SKIN PROTECTION.

  • Page 7: Fuse Replacement

    Installation and Maintenance 012-13943B Photoelectric Effect Apparatus Connect Cords and Cables NOTE: Before connecting any cords or cables, be sure that all the ON/OFF switches on all parts of the apparatus are in the OFF position. NOTE: The input power connectors on the power supplies and DC Current Amplifier can be operated at 110 VAC or 220 VAC.
  • Page 8 Data Interface 8-pin DIN Ports: One port is for measuring the DC Voltage (-4.5V – 0V/30V) and can be connected to the data processing apparatus (PASCO Interface) and the other port is for measuring filament voltage* (0 – 6.3V) and is not used in this experiment.

  • Page 9: Measurement Accuracy

    Power Switch: Turns the power to the instrument ON or OFF. • Data Interface 8-pin DIN Port: Port for connecting the data processing apparatus (PASCO Interface). • Current Range Switch: Sets the current range for the instrument's current amplifier (10 to 10 •...

  • Page 10: Software Setup

    Interface Software Setup Turn on the interface and start the PASCO Capstone software. The 850 Universal Interface will automatically identify the two pieces of equipment that are connected to it (DC Current Amplifier and Tunable DC Power Supply). For information about using the equipment with the PASCO 750 Interface or PASCO 500 Interface, please see Appendix D.
  • Page 11 “Select Measurement” menu icon in the other digits display and select “Current (A)”. Menu icon Menu icon Select “Voltage (V)” Select “Current (A)” Figure: PASCO Capstone Digits Displays For this experiment you will select the “Table-Graph” template from the workbook page in the PASCO Capstone software.
  • Page 12 Photoelectric Effect Apparatus SE-6609...

  • Page 13: Preparation Before Measurement

    Universal Interface Channel B. PASCO Capstone Software Configuration In PASCO Capstone, choose the table-graph template and put three columns in the table. In the first column, create a User-Entered data set called Wavelength with units of nm. In the properties of this measurement, set the symbol to (lambda).
  • Page 14 Photoelectric Effect Apparatus SE-6609 Select the calculation f in the second column of the table. In the third column of the table, select the Voltage from the DC Power Supply. Rename the measurement in the column header to “Stopping Voltage”.
  • Page 15 Experiment 1 – Planck’s Constant, h 012-13943B Photoelectric Effect Apparatus Uncover the window of the Mercury Light Source. Spectral lines of 365 nm wavelength will shine on the cathode in the phototube. WARNING: The Mercury Light Source Enclosure Start previewing in Capstone and click the first row in the table display cap is very warm.
  • Page 16 Photoelectric Effect Apparatus SE-6609 How can you find the value of the Work Function from the graph of Stopping Potential versus Frequency? Extension Repeat the data measurement and analysis procedure for the other two aperture diameters, 2 mm and 8 mm.

  • Page 17: Preparation For Measurement

    Experiment 2 – Measuring Current-Voltage Characteristics 1 012-13943BPhotoelectric Effect Appa- Experiment 2 – Measuring Current-Voltage Characteristics 1 Measuring Current-Voltage Characteristics of Spectral Lines - Constant Frequency, Different Intensity This section outlines the instructions for measuring and comparing the current versus voltage characteristics of one spectral line at three different light intensities.
  • Page 18 Photoelectric Effect Apparatus SE-6609 Uncover the window of the Mercury Light Source. Spectral lines of 436 nm will shine on the cathode in the Photodiode Enclosure. Adjust the -4.5V– 30V VOLTAGE ADJUST knob so that the current display is zero. Record the voltage and current in Table 4.
  • Page 19 Experiment 3 – Measuring Current-Voltage Characteristics 2 012-13943BPhotoelectric Effect Appa- Experiment 3 – Measuring Current-Voltage Characteristics 2 Measuring Current-Voltage Characteristics of Spectral Lines - Different Frequencies, Constant Intensity This section outlines the instructions for measuring and comparing the current versus voltage characteristics of three spectral lines, 365 nm, 405 nm, and 436 nm, but with the same light intensity.
  • Page 20 Photoelectric Effect Apparatus SE-6609 Uncover the window of the Mercury Light Source enclosure. Spectral lines of 405 nm will shine on the cathode in the Photodiode Enclosure. Adjust the -4.5V– 30V VOLTAGE ADJUST knob so that the current display is zero. Record the voltage and current in Table 5.

  • Page 21: Appendix A: Specifications

    Appendix A: Specifications 012-13943B Photoelectric Effect Apparatus Appendix A: Specifications Supply voltage: 110-120V~/220-240V~ Mains supply voltage fluctuations: ±10% Frequency: 50/60Hz Fuse Protection for inputs: 250 V T 2A Display: 3-1/2 or 4-1/2 Digit Display Using site: Indoor use Temperature: Operating: 0°C to 40 °C, Storage: -20 °C to 50 °C Operating Altitude: 0 to 2000 meters Relative Humidity: Non-condensing <...

  • Page 22: Appendix B: Teacher's Notes

    Photoelectric Effect Apparatus SE-6609 Appendix B: Teacher’s Notes Sample Data Experiment 1: Measuring and Calculating Planck’s Constant, h The following table shows typical data for Stopping Voltage of Spectral Lines for the 2 mm diameter aperture. Stopping Potential of Spectral Lines, 2 mm diameter Aperture Item Wavelength, ...
  • Page 23 Appendix B: Teacher’s Notes 012-13943B Photoelectric Effect Apparatus The slope value of 0.4161 V/10 Hz gives a value for Planck’s constant of h = 6.666 x 10 J s. This value has a 0.60% difference with the accepted value, h = 6.626 x 10 J s.
  • Page 24 Photoelectric Effect Apparatus SE-6609 Experiment 2: Measuring Current-Voltage Characteristics Current-Voltage Characteristics of Spectral Lines Constant Frequency, Different Intensity The following table shows typical data for current and voltage for one spectral line (436 nm) for three different intensities. Current and Voltage, Constant Frequency, Different Apertures Current (436nm) ×10...
  • Page 25 Experiment 3: Measuring Current-Voltage Characteristics 012-13943B Photoelectric Effect Appara- Experiment 3: Measuring Current-Voltage Characteristics Current-Voltage Characteristics of Spectral Lines: Different Frequencies, Constant Intensity The following table shows typical data for current and voltage for three spectral lines (365. 405, and 436 nm) for one aperture (4 mm diameter).
  • Page 26 Photoelectric Effect Apparatus SE-6609 Questions: Experiment 1 - Planck’s Constant How does your calculated value of h compare to the accepted value? The calculated value of h for the 4 mm diameter aperture is within 1.8% of the accepted value of h. Student answers will vary.

  • Page 27: Appendix C: Technical Support

    Use an included UI-5219 8-Pin DIN male-to-male cable to connect each of the instruments to an analog channel on the 750 or 500 interface. In the PASCO Capstone Hardware Setup window, click the icon of the analog port that is connected to the DC Power Supply and choose “DC Power Supply, Voltage” from the list.

  • Page 28: Appendix E: Product End Of Life Disposal Instructions

    2.1 x 10 If you are using software other than PASCO Capstone, identify the DC Power Supply and the DC Current Amplifier as “Voltage Sensors” and use the calculator in the software to convert the voltage readings to the proper scale.

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