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Related Manuals for PASCO h/e Apparatus
Summary of Contents for PASCO h/e Apparatus
- Page 1 Instruction Manual 012-04049J Includes Teacher's Notes 08/98 and Experiment Guide Typical Experiment Results for the PASCO scientific Model AP-9368 and AP-9369 h/e Apparatus h/e Apparatus Accessory Kit © 1989 PASCO scientific $5.00...
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Page 3: Table Of Contents
012-04049J h/e Apparatus and h/e Apparatus Accessory Kit Table of Contents Section Page Copyright, Warranty, and Equipment Return ..........ii Introduction ..................... 1 Background Theory ..................2 Equipment and Setup ..................3 Equipment List ..................3 Installing the Batteries ................3 Battery Voltage Check................ -
Page 4: Copyright, Warranty, And Equipment Return
PASCO will repair or replace at its option any part of ➀ The packing carton must be strong enough for the the product which is deemed to be defective in material item shipped. -
Page 5: Introduction
PASCO Mercury Vapor Light Source (Model OS-9286) allows an accurate determina- tion of the h/e ratio and thus a determination of h, Planck's constant. Figure 1. The h/e Apparatus Shown With the Accessory Kit and Mercury Vapor Light Source ®... -
Page 6: Background Theory
Apparatus and h/e Apparatus Accessory Kit 012-04049J Background Theory where KE is the maximum kinetic energy of the emit- Planck's Quantum Theory ted photoelectrons, and W is the energy needed to re- By the late 1800's many physicists thought they had ex-... -
Page 7: Equipment And Setup
➤ ➤ ➤ ➤ ➤ NOTE: The h/e Apparatus can also be powered using a ±9 V dual power supply. Just remove the Mercury Vapor light batteries and connect +9 V to the "+6 V MIN"... -
Page 8: Equipment Setup
Lens/Grating Assembly Support Base Assembly Coupling Bar Assembly Figure 5. Equipment Setup Using a Mercury Vapor Light Source and the h/e Apparatus Equipment Setup Light Block The standard setup for h/e experiments is shown in Figure 5. Details for setting up the apparatus are described below. - Page 9 Roll the light shield of the Apparatus out of the way to reveal the white photodiode mask inside the Appara- tus. Rotate the h/e Apparatus until the image of the aperture is centered on the window in the photodiode mask. Then tighten the thumbscrew on the base support rod to hold the Apparatus in place.
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Page 10: Using The Accessory Kit Filters
The filter frames have magnetic strips and mount to the out- measuring. Note that the output voltage will drift with side of the White Reflective Mask of the h/e Apparatus. the absence of light on the photodiode. Use the green and yellow filters when you're using the Read the output voltage on your digital voltmeter. -
Page 11: Experiment 1: Wave Model Vs Quantum Model
Lens/Grating by tightening the thumbscrew. Align the system by rotating the h/e Apparatus on its support base so that the same color light that falls on the opening of the light screen falls on the window in the photodiode mask, with no overlap of color from other spectral lines. - Page 12 Procedure Part A Adjust the h/e Apparatus so that only one of the spectral colors falls upon the opening of the mask of the photodiode. If you select the green or yellow spectral line, place the corresponding colored filter over the White Reflective Mask on the h/e Apparatus...
- Page 13 Apparatus and h/e Apparatus Accessory Kit Part B You can easily see five colors in the mercury light spectrum. Adjust the h/e Apparatus so that only one of the yellow colored bands falls upon the opening of the mask of the photodiode.
- Page 14 Apparatus and h/e Apparatus Accessory Kit 012-04049J Notes ®...
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Page 15: And Frequency
Align the system by rotating the h/e Apparatus on its support base so that the same color light that falls on the opening of the light screen falls on the window in the photodiode mask with no overlap of color from other spectral bands. - Page 16 012-04049J Procedure You can see five colors in two orders of the mercury light spectrum. Adjust the h/e Apparatus carefully so that only one color from the first order (the brightest order) falls on the opening of the mask of the photodiode.
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Page 17: Technical Information
012-04049J h/e Apparatus and h/e Apparatus Accessory Kit Technical Information Theory of Operation Due to the ultra high input impedance, once the capacitor has been charged from the photodiode current it takes a In experiments with the h/e Apparatus, monochromatic... -
Page 18: Schematic Diagram
Apparatus and h/e Apparatus Accessory Kit 012-04049J 1N914 – P3-3 J3-3 OUTPUT AD549JH VACUUM 1N914 PHOTODIODE 1P39 PUSH TO ZERO J3-4 P3-4 P3-5 J3-5 BATTERY TEST J3-4 P1-4 P3-1 J3-1 +6V MIN J3-4 P1-4 J1-5 P1-5 P2-1 J2-1 J2-4... -
Page 19: Teacher's Guide
012-04049J h/e Apparatus and h/e Apparatus Accessory Kit Teacher’s Guide Exp 1-h/e Apparatus and Accessory Kit Part A In each case, the time to reach full voltage increases dramatically with decreasing intensity. (up to a minute for 20% intensity) Part B... - Page 20 Apparatus and h/e Apparatus Accessory Kit 012-04049J Exp 2-h/e Apparatus and Accessory Kit Analysis First order: h = 6.6406E-34 (0.22% off) = 1.412 eV Second order: h = 6.7647E-34 (2.1% off) = 1.459 eV ®...
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Page 21: Technical Support
PASCO appreciates any cus- ➤ If your problem is with the PASCO apparatus, note: tomer feed-back. Your input helps us evaluate and Title and model number (usually listed on the improve our product.
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