Description
Hi, I would like you to finish up the calculation for the photoelectric effect experiment. I have attached all you need to finish the calculation and answer the questions in each part. you will see the steps in the file called "Photoelectric Effect -New" . Moreover, Stopping voltage excel file is for the 1st part. the 2nd part and third part has also, the excel files you will finish the question and the calculation and add them to the world document file called Photoelctric effect. remember I want you to organize everything. add graphs and table in the calculation section in the world file. I kind of started it but I did not finish the 1st part because I could find a good answers. you have to answer the questions and the analysis.
Unformatted Attachment Preview
Purchase answer to see full attachment
Explanation & Answer
Attached.
Surname 1
Name:
Instructor:
Course:
Date:
The attached word document contains the answer to photoelectric effect experiment.
Surname 1
Name:
Instructor:
Course:
Date:
PHOTOELECTRIC EFFECT
Objectives
To determine Photoelectric effect theory
To measure different voltages associated with different wavelengths of light
To determine the value of Plank’s constant.
Introduction
In the year 1887, Hertz discovered that when a light of sufficient frequency is illuminated on a
metallic surface, electricity may be emitted. In 1900 Lenard identified positively the liberated
particles like electrons and their energies. He studied the fraction of the number and energy of
electrons as a function of the wavelength of the incident light and its intensity. The results from
this study were not able to be proved using the wave theory of light.
The phenomenon was not explained until Einstein with the help of Planck’s idea of radiation
comes in small quanta experimented. According to Einstein, the energy of the ejected electrons is
proportional to the energy of the incident light with a constant called work function. As the
intensity of light increases, the energy of the emitted electrons would increase. The photoelectric
Surname 2
effect is the emission of electrons from the surface of the metal when electromagnetic radiation
shines on the metal.
The maximum electrons kinetic energy when they leave a metal surface due to radiation by light
depend on the wavelength of the light and not the intensity of the light. The Einstein suggestions
did not have enough evidence to confirm or disapprove the equations. Millikan comes up with
precise measurements that proved that the theory was true and correct.
Apparatus
Mercury Lamp and Power Supply (in SE-6609)
Photodiode (in SE-6609)
Track (in SE-6609)
DC Current Amplifier (BEM-5004)
DC Power Supply I (BEM-5001)
850 Universal Interface (UI-5000)
Procedure
1. Mercury lamp and photodiode case mounted on the track
2. Power cord connected to the Mercury Lamp Power Supply from the Mercury Light
Source and the Mercury Lamp Power Supply was connected to an outlet.
3. Mercury Lamp turned on and left for 10 minutes to warm and cover placed.
Surname 3
4. DIN-plug connected to DIN-plug cable between channel A on the 850 interfaces and the
DC Amplifier. DIN-plug connected to DIN-plug cable between channel B on the 850
interfaces and the DC Power Supply port.
5. The Current Ranges switch turned to 10^-13 amperes on the DC Current Amplifier.
Calibration meter was activated and adjusted to read zero amperes.
6. Calibration was put in the out position for measuring.
7. On the DC Power Supply, -4.5 to 0 V range was selected.
8. Cables were connected to the photodiode:
9. BNC-plug was connected to BNC-plug cable between port K on the Photodiode and the
BNC jack ...