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Included Equipment1. Optical Filters, Apertures, Caps, and Screws2. Mercury Light Source Enclosure3. Base4. Photodiode Enclosure 5. Power Supply6. Photoelectric Effect Apparatus

Cables and Cords

Power Cable for Photoelectric Effect ApparatusBNC Connector Cable for Photodiode EnclosureBanana-plug Patch Cords, Red and Blue

Items in the Optical Filters Box7. Filters: 365 nm, 405 nm, 436 nm, 546 nm, 577 nm8. Apertures: 2 mm diameter, 4 mm dia., 8 mm dia.9. Caps: Photodiode, Mercury Lamp

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Intensity 2

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Figure 2: Current vs. Intensity

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Figure 3: Current vs. Frequency

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(,$("#$8A6=B$/#-$'%(#$C///?70'+,?+,1D?Procedure

PART 1: Open a new DataStudio file. DataStudio. When the Welcome to DataStudio screen opens,

select ‘Enter Data’. An empty Table display with columns for X and Y data and an empty Graph display with X- and Y- axes will open. Click the Summary button in the toolbar to open the Summary list.

ORIf the screen does not appear, select ‘New Empty Data Table Experiment

Summary list will open. Double-click the Graph display icon in the bottom half of the Summary list, or select ‘Add Display

Experiment Graph

Item Description

Current Amplifier -8 to 10-13 A, in six ranges, 3-1/2 digit display.Zero drift: !!"0.2% of full range reading in 30 minutes at the range of 10-13 A (after 20 minute warm-up).

Voltage Output for Photoelectric Tube

Voltage adjustment: –2— +2V and –2— +30V (two ranges), 3-1/2 digit display.Stability: !0.1%

Spectral response range: 300–700 nmMinimum cathode sensitivity: #$%A/LmAnode: nickel ringDark current: ! 2 x 10-13 A (–2V!VAK!&V)

Five filters with central wavelengths of 365.0, 404.7, 435.8, 546.1, and 578.0 nm

Mercury lamp

Measuring error For Plank’s constant, within'()*'typical

Welcome to DataStudio

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--

PART 2: Create labels for variables and units.Editable Data Summary

Data Properties

Under ‘Measurement Nam Data PropertiesStopping Potential versus Frequency’ for Experiment 1.

Under ‘Variable Name X FrequencyUnits x10^14 HzVariable Name’, use the menu button (down arrow) to

open the menu and select ‘YStopping Potential Variable Name V

UnitsOK Data Properties

PART 3: Enter X- and Y- data into the Table display.

first row of the Table display using the following pattern: <X- data> TAB <Y-data> RETURN.Enter the rest of the ordered pairs of Frequency and Stopping Potential using the same pattern. Remember to press RETURN after the last datum is entered. As the ordered pairs are entered they will be plotted in the Graph display.

In the Summary list, slowly double-click ‘Data’ (click-pause-click) to highlight ‘ ’. Enter an appropriate label (e.g., 4 mm aperture) for the entered data.

PART 5: Analyze the Data.In the Graph display, click the ‘Fit’ menu and select ‘Linear Fitlegend box that opens, the value of ‘ ’ is the slope of the best fit line for your data.

To plot more runs of data, select ‘ ’ from the menu and repeat the procedure (PART 2 to PART 5).

In order to have the runs of data appear on the same plot in the Graph display, double-click the Graph display to open the window. Under the ‘ ’ tab, click ‘ ’. Click to close the window.

!

Data Properties

Select ‘Y’ in the ‘Variable Name’ menu

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