Determining Planck’s Constant Physics Mechanics Science Kits for Lab Use in Schools & Colleges ATICO Export

Easy to use:

• This compact apparatus allows students to determine Planck’s constant using the stopping potential method with high accuracy

• Special technology ensures that only the frequency of the maximum wavelength of LED light contributes to the result

• The five supplied LEDs act as monochromatic light sources with precisely defined wavelengths

• LED sockets include special couplings that shield them from external light

• Two potentiometers (coarse and fine) allow adjustment of photoelectric current in the nanoamp range

• Two four-decade displays enable precise calibration of current to zero

• The stopping potential can then be read directly

• Demonstrates that light intensity does not affect the kinetic energy of photoelectrons

Various evaluation methods:

• Measurements can be plotted to form a straight-line graph
• The slope of the graph is used to calculate Planck’s constant
• The work function of the cathode material can also be determined
• Both values can also be calculated using spreadsheet-based analysis

Included items:

• 1 × Compact equipment for the determination of h
• 2 × Experiment lead, 75 cm
• 1 × LED unit, 472 nm
• 1 × LED unit, 505 nm
• 1 × LED unit, 525 nm
• 1 × LED unit, 588 nm
• 1 × LED unit, 611 nm
• 1 × Protective cap for photocell