Photoelectric Test Question Here is a set of data from Millikan’s initial photoelectric experiments: Wavelength (nm) Stopping Potential...
50.1K
Verified Solution
Link Copied!
Question
Physics
Photoelectric Test Question
Here is a set of data from Millikan’s initial photoelectricexperiments:
Wavelength (nm) Stopping Potential (Volts)
254nm 2.57V
313nm 1.67V
365nm 1.09V
405nm 0.73V
434nm 0.55V
V0 is the stopping voltage for each of the incident wavelengthsof light. All light is shown upon the same metal surface. From thisdata we can determine an experimental value for Planck’s constant(h) and the work function of the metal (Φ).
1) Draw the circuit diagram for the photoelectric effect, withthe light incident upon one metal surface. Draw the potential withthe polarity that could stop the photocurrent. How does thestopping voltage stop the photocurrent?
2) Convert the wavelength to frequency (f), then plot thestopping potential energy (e*V0) (on the y-axis) vs. f (on thex-axis). Make your plot large. You can plot eV in eitherelectron-Volts of energy or Joules of energy. Draw a straight lineof best fit through the data. The slope of that line is theexperimental value for Planck’s constant. Explain why.
3) Extrapolate your straight line by through the y-axis. They-intercept of your straight line is the work function of the metal(Φ). Explain why this is the case. What is the value you obtain?What metal do you think this is?
Photoelectric Test Question
Here is a set of data from Millikan’s initial photoelectricexperiments:
Wavelength (nm) Stopping Potential (Volts)
254nm 2.57V
313nm 1.67V
365nm 1.09V
405nm 0.73V
434nm 0.55V
V0 is the stopping voltage for each of the incident wavelengthsof light. All light is shown upon the same metal surface. From thisdata we can determine an experimental value for Planck’s constant(h) and the work function of the metal (Φ).
1) Draw the circuit diagram for the photoelectric effect, withthe light incident upon one metal surface. Draw the potential withthe polarity that could stop the photocurrent. How does thestopping voltage stop the photocurrent?
2) Convert the wavelength to frequency (f), then plot thestopping potential energy (e*V0) (on the y-axis) vs. f (on thex-axis). Make your plot large. You can plot eV in eitherelectron-Volts of energy or Joules of energy. Draw a straight lineof best fit through the data. The slope of that line is theexperimental value for Planck’s constant. Explain why.
3) Extrapolate your straight line by through the y-axis. They-intercept of your straight line is the work function of the metal(Φ). Explain why this is the case. What is the value you obtain?What metal do you think this is?
Answer & Explanation Solved by verified expert
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Other questions asked by students
StudyZin's Question Purchase
1 Answer
$0.99
(Save $1 )
One time Pay
- No Ads
- Answer to 1 Question
- Get free Zin AI - 50 Thousand Words per Month
Unlimited
$4.99*
(Save $5 )
Billed Monthly
- No Ads
- Answers to Unlimited Questions
- Get free Zin AI - 3 Million Words per Month
*First month only
Free
$0
- Get this answer for free!
- Sign up now to unlock the answer instantly
You can see the logs in the Dashboard.