Page 2 - ii; Table of Contents
® ii Table of Contents Equipment List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 Limited Warranty and Limitation of Liability - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 Safety Information - - - - - - - - - - - - - ...
Page 3 - I n s t r u c t i o n M a n u a l; Franck-Hertz Experiment; Equipment List; Included Equipment
I n s t r u c t i o n M a n u a l 012-14264A 1 012-14264A Franck-Hertz Experiment SE-9639 Equipment List Included Equipment Model Quantity 1. Tunable DC (Constant Voltage) Power Supply I SE-6615 1 2. Tunable DC (Constant Voltage) Power Supply II SE-9644 1 3. DC Current Amplifier SE-6621 1 4. Argon T...
Page 4 - Limited Warranty and Limitation of Liability; attention to the insulation surrounding the connectors.; Item
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 2 012-14264A Recommended Items Limited Warranty and Limitation of Liability This Brolight product is free from defects in material and workmanship for one year from the date of purchase. This warranty does not cover fuses, or damage from acci...
Page 5 - Electrical Symbols
F r a n c k - H e r t z E x p e r i m e n t E l e c t r i c a l S y m b o l s 3 012-14264A • Special note: If a dangerous voltage is applied to an input terminal, then the same voltage may occur at all other terminals. Electrical Symbols Installation and Maintenance Alternating Current Direct Curren...
Page 6 - plate onto the argon tube enclosure.; Fuse Replacement; Argon Tube Specifications; Note; care! Do not expose the tube to mechanical stress or strain.; WARNING
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 4 012-14264A Replace the Argon Tube • Use a flat-blade screwdriver to remove the two small screws that hold the back plate onto the argon tube enclosure. • Use a small flat-blade screwdriver to pry the back panel off of the enclosure.• Pull u...
Page 7 - Introduction
F r a n c k - H e r t z E x p e r i m e n t I n t r o d u c t i o n 5 012-14264A Introduction In 1914, James Franck and Gustav Hertz discovered in the course of their investigations an “energy loss in distinct steps for electrons passing through mercury vapor”, and a corresponding emission at the ul...
Page 8 - F r a n c k - H e r t z E x p e r i m e n t; e•U
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 6 012-14264A When an electron has an inelastic collision with an argon atom, the kinetic energy lost to the atom causes one of the outer orbital electrons to be pushed up to the next higher energy level. This excited electron will within a ve...
Page 10 - Cables and Cords
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 8 012-14264A 1. On the DC Current Amplifier, connect the special BNC-to-BNC cable between the port on the amplifier marked “ INPUT SIGNAL ” and the port on the Argon Tube Enclosure marked “ A ”. 2. On Power Supply II, (SE-9644) connect the ...
Page 13 - Experiment Procedure 1; Adjust Operating Voltages
F r a n c k - H e r t z E x p e r i m e n t E x p e r i m e n t P r o c e d u r e 1 11 012-14264A Experiment Procedure 1 Adjust Operating Voltages 1. Connect all the cables and cords as shown in the section “Connect Cables and Cords” (page 7). 2. On the Tunable DC (Constant Voltage) Power Supply I, ...
Page 14 - Table 1.1: Accelerating Voltage and Tube Current; Analysis
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 12 012-14264A Manual Measurements 1. Increase the accelerating voltage V G2K by a small amount (for example, 1 V). Record the new accelerating voltage V G2K (value read on voltmeter) and current I A (read on “Ammeter”) in Table 1:1. Continue ...
Page 15 - Questions
F r a n c k - H e r t z E x p e r i m e n t Q u e s t i o n s 13 012-14264A 2. Find the peak (or valley) positions which match the accelerating voltages labeled “V1, V2, V3, V4, V5, and V6”. 3. Obtain the value of argon atom’s first excitation potential (V 0 ). 4. Calculate the value of Planck’s Con...
Page 16 - Experiment Procedure 2; Using a PASCO Interface and Data Acquisition Software; Hardware Setup: Connect Cables and Cords; Quantity
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 14 012-14264A Experiment Procedure 2 Using a PASCO Interface and Data Acquisition Software Items Needed *See the PASCO web site at www.pasco.com for more information Hardware Setup: Connect Cables and Cords 1. Connect all the cables and cords...
Page 17 - Peak Voltage
F r a n c k - H e r t z E x p e r i m e n t S o f t w a r e S e t u p 15 012-14264A 3. Connect a second 8-pin DIN Extension Cable from the 0 - 100V / 0 - 200V INTERFACE port on Power Supply II to ANALOG INPUT B on the Universal Interface. 4. Turn ON the power for the Universal Interface, the power s...
Page 18 - Recording Data; Record
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 16 012-14264A • Diff between Peaks = diff(1,[Trough Voltage (V)]) with units of (V) (This calculation calculates the voltage difference between adjacent current troughs.) 9. In the table, turn on the mean and standard deviation . Recording Da...
Page 20 - Appendix A: General Specifications
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 18 012-14264A Appendix A: General Specifications Item Description Supply voltage: 110 – 120 V or 220 – 240 V Supply voltage fluctuations: ±10% Fuse protection for inputs: 250 V T2A Display: 3-1/2 or 4-1/2 digit display Using site: Indoor use ...
Page 21 - Appendix B: Teacher ’s Notes; Sample Data 1: Manual Measurements; Table 1: Accelerating Voltage and Tube Current
F r a n c k - H e r t z E x p e r i m e n t A p p e n d i x B : T e a c h e r ’ s N o t e s 19 012-14264A Appendix B: Teacher ’s Notes Sample Data 1: Manual Measurements Filament voltage (V) = 3.55 V V G1K = 1.5 V V G2A = 11.0 V Table 1: Accelerating Voltage and Tube Current V G2K (V) 1 2 3 4 5 6 7 ...
Page 22 - Table 2: Peak and Valley Voltages
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 20 012-14264A Table 2: Peak and Valley Voltages Analysis Obtain the value of argon atom’s first excitation potential (V 0 ): V 0 (peak) = (V 6 - V 1 )/5 = 11.3 V; V 0 (valley) = (V 6 - V 1 )/5 = 12.0 V; Therefore: V 0 = 11.65 V; Calculate the...
Page 23 - Sample Data 2: Using a PASCO Interface
F r a n c k - H e r t z E x p e r i m e n t S a m p l e D a t a 2 : U s i n g a P A S C O I n t e r f a c e 21 012-14264A Use both. The average of the accelerating voltages matching peak positions and the valley positions is the voltage for the approximate excitation energy, e•U 0 . 2. Why are the p...
Page 24 - Appendix C: Technical Support
S E - 9 6 3 9 F r a n c k - H e r t z E x p e r i m e n t 22 012-14264A Analysis Obtain the value of argon atom’s first excitation potential: V 0 = 11.44 V; Calculate the value of Planck’s Constant, h where e = 1.602 x 10 -19 C, = 108.1 nm, and c = 3 x 10 8 m/s. Based on the data, Planck’s Constan...
Page 25 - Copyright Notice; Warranty; Appendix D: Product End of Life; Product End of Life Disposal Instructions:
F r a n c k - H e r t z E x p e r i m e n t A p p e n d i x D : P r o d u c t E n d o f L i f e 23 012-14264A Copyright Notice The PASCO scientific manual is copyrighted and all rights reserved. However, permission is granted to non-profit educational institutions for reproduction of any part of the...
