Upload File

mini-lab: led voltage & planck’s constant goal is to

  • Home
  • Documents
  • Mini-Lab: LED Voltage & Planck’s Constant Goal is to
4
Mini-Lab: LED Voltage & Planck’s Constant 1. Goal is to determine the “turn on” voltage for each LED in order to produce a graph of voltage versus frequency. The slope can be used to find Planck’s constant! 2. Use an ammeter and voltmeter to measure the current and voltage for the LED. Adjust to observe a range of values, but do not exceed 2 mA. Repeat for each LED. 3. Determine a linear regression for each LED and take the y-intercept to be the “turn on” voltage. 4. Create a graph of voltage versus frequency (determined by the diffraction grating experiment) for the six LED’s. Use the slope to determine Planck’s constant and determine the percent error.

Upload: others

Post on 19-Dec-2021

7 views

Category:

Documents


0 download

Report

TRANSCRIPT

Page 1: Mini-Lab: LED Voltage & Planck’s Constant Goal is to

Mini-Lab: LED Voltage & Planck’s Constant 1.  Goal is to determine the “turn on” voltage for each LED in

order to produce a graph of voltage versus frequency. The slope can be used to find Planck’s constant!

2.  Use an ammeter and voltmeter to measure the current and voltage for the LED. Adjust to observe a range of values, but do not exceed 2 mA. Repeat for each LED.

3.  Determine a linear regression for each LED and take the y-intercept to be the “turn on” voltage.

4.  Create a graph of voltage versus frequency (determined by the diffraction grating experiment) for the six LED’s. Use the slope to determine Planck’s constant and determine the percent error.

Page 2: Mini-Lab: LED Voltage & Planck’s Constant Goal is to

Ammeter Voltmeter

A

V

Page 3: Mini-Lab: LED Voltage & Planck’s Constant Goal is to

A

V

Page 4: Mini-Lab: LED Voltage & Planck’s Constant Goal is to

Voltage (V)

Current (mA) red orange yellow green blue violet

0.3

0.6

0.9

1.2

1.5

V vs I slope V vs I y-int


MT : METALLURGICAL ENGINEERING2012 METALLURGICAL ENGINEERING – MT MT 2/16 Useful Data Universal gas constant R = 8.314 J/mol.K Planck’s constant h = 6.63 10-34 J.s Acceleration

SS20802 Planck's Constant User Manual - Sci-Supply Planck's Constant User...Figure 1 Planck’s Constant Measuring Instrument 1. ... Experiment Procedures: Finding the Relationship

Planck’s Constant and the Photoelectric Effect Lulu Liu Partner: Pablo Solis Junior Lab 8.13 Preparatory Lab September 25 th, 2007

Photoelectric Effect Worksheet - Just Onlyjustonly.com/chemistry/chem201/students/labs/photoelectric_effect.pdfwhere h is the Planck constant ... Planck’s constant (C) stopping potential

The contrasting roles of Planck's constant in …the experimental blackbody data when using theoretical ideas associated with Wien’s proposed form for the radiation spec-trum. Planck’s

Planck’s constant in the light of an incandescent lamp

Line Spectra and the Rydberg Constant - Portal IFSC · Web viewLED’s and Determining Planck’s Constant Pre-laboratory Questions Read the experiment and answer the following questions

Planck’s blackbody radiation law: Presentation in …Gerhard Kramm and Nicole Mölders, Planck’s blackbody radiation law 1 Planck’s blackbody radiation law: Presentation in different

Four Measurements of Planck’s constant

พื้นฐานของการส องสว าง · h คือ ค าคงที่ของพลังค (planck’s constant = 6.62*10 -34 Js) 3 ตัวอย

Numerical Solution to the Schr odinger Equation for the ...bilyalovs.net/rustem/physics/distinction-paper.pdf · as Planck’s constant, and the idea that energy is quantized started

From Planck’s Constant to Quantum Mechanics...PLanck’s lucky solution Max Planck solves the puzzle of the spectrum of black body radiation. With a new empirical formula: 1858-1947

PHOTOELECTRIC DETERMINATION OF PLANCK’S h

Experimental Evidence for Variability in Planck’s …file.scirp.org/pdf/OPJ_2016063013301299.pdfExperimental Evidence for Variability in Planck’s Constant . ... a purely electromagnetic

Quantum Theory without Planck’s Constant arXiv:1203.5557v1

Light Emitting Diode (LED) characterizationknown LED’s wavelength, you should also be able to measure a fundamental constant of nature: Planck’s constant h. Background One photonic

ELECTRONIC STRUCTURE Bohr ModelRydberg Eqn & Constant E-Levels; quantum #’s Planck’s Eqn & Constant Ionization E Electromagnetic Radiation Classic Physics

PLANCK’ CONSTANT - Birla Institute of Technology and ...universe.bits-pilani.ac.in/uploads/Planck01.pdfapparatus used in the planck’s constant determination experiment variac photodiode

Blackbody Radiation. Max Planck, Planck’s constant Max Karl Ernst Ludwig Planck Found an empirical formula which fit the measured blackbody curve Found

First determination of the Planck constant using the LNE watt … 04.pdf · detail and gives its first measurements of the Planck’s constant . The value determined in air h is h

JEE (ADV) PAPER – 1 - 2016 PHYSICS SECTION-1 … (ADV) PAPER – 1 - 2016 PHYSICS SECTION-1 SINGLE CORRECT ANSWER 1. In historical experiment to determine Planck’s constant,

Planck’s Hypothesisaephraim/201/Lecture7-2...Planck’s Hypothesis Energy per frequency: Planck’s constant: h = 6.6 • 10-34 J s [ or J / Hz, since Hz = 1/s] Planck’s “quantum

Some invariants of Poisson manifoldsradko/thesis.pdf · is Planck’s constant, one should obtain classical mechanics from quantum mechanics by formally taking the limit 0. Thus for

Measurement Contextuality and Planck’s Constant Contextuality and Planck’s Constant Lucas Kocia Department of Physics, Tufts University, Medford, Massachusetts 02155, U.S.A. and

Measurement of Planck’s constant, h - Astronomybelz/phys3719/presentations/peterson.pdfPlanck’s Constant •Describes the size of quanta [2] •Most prevalent constant along with

Objective Physics: for Medical and Engineering Entrance ... speed of light (c), Planck’s constant (h) and gravitational constant (G) are taken as the fundamental units in a system

Planck’s Constant { Measuring - Dr. Smith Home Pagephysicsx.pr.erau.edu/Courses/CoursesS2017/PS315/Planck's Constant...Planck’s Constant { Measuring h Dr. Darrel Smith1 Physics

Light & Atomic Spectra & Nuclear Chemistry Planck’s Constant

Coarse-grained pressure dynamics in super uid turbulence · named quantum vortices. The circulation around such vortices is quantized in units of Planck’s constant over the mass

Measurement of Planck’s constant Francesco Gonnella Matteo Mascolo

GModel POWER-13278; No.of Pages26 ARTICLE IN …amsl/publications/10JPSPark.pdfe charge of an electron, 1.602×10−19 C F Faraday’s constant, 96,487Cmol−1 −reduced Planck’s

From Planck’s Constant to Quantum Mechanics Matteo Mascolo

MEASURING PLANCK’S CONSTANT BY COMPUTER

PLANCK’S CONSTANT IN THE LIGHT OF AN INCANDESCENT LAMP olampiad/fizik/jahani... · PLANCK’S CONSTANT IN THE LIGHT OF AN INCANDESCENT LAMP ... known as LDR, the acronym of Light

Experiment 10: ATOMIC SPECTROSCOPYfaculty.ccbcmd.edu/~cyau/122 10.0 Atomic Spectroscopy AUG 2013.pdfh = Planck’s constant = 6.626 x 10 34 J s ... 118 EXPERIMENT 10: SPECTROSCOPY