Apparatus for Determining Planck's Constant Advanced Model

The Apparatus for Determining Planck's Constant Advanced Model is designed for precise investigation of the photoelectric effect and accurate determination of Planck’s constant. The system enables students to study the characteristic behavior of a photoelectric tube, verify the existence of the threshold frequency, and calculate Planck’s constant using Einstein’s photoelectric equation. Equipped with a high-precision photoelectric tube and integrated data acquisition capabilities, the apparatus offers enhanced accuracy and reliability for laboratory experiments. Experimental data can be collected manually or automatically through the built-in data acquisition interface and transferred to a computer via USB for detailed analysis. This apparatus is ideally suited for advanced physics laboratories, providing students with hands-on experience in quantum physics, data acquisition techniques, and scientific data analysis. Physics Lab Experiments from Atico Exports.

Demonstrate the Photoelectric Effect:

• Observe the emission of photoelectrons when light interacts with a photosensitive surface
• Explore the particle nature of light

Measure the Characteristic Curve of a Photoelectric Tube:

• Study the relationship between photoelectric current and applied voltage
• Understand the behavior of photoelectrons under varying operating conditions

Verify the Threshold Frequency:

• Investigate the minimum frequency required to release photoelectrons
• Confirm the existence of the threshold frequency predicted by quantum theory

Determine Planck’s Constant:

• Apply Einstein’s photoelectric equation to experimental data
• Calculate Planck’s constant with high accuracy

Perform Computer-Based Data Acquisition and Analysis:

• Utilize the integrated data acquisition system and software
• Perform automated data collection, processing, and analysis

Filter Wavelengths:

• 365 nm
• 405 nm
• 436 nm
• 546 nm
• 577 nm

Aperture Sizes:

• 2 mm
• 4 mm
• 8 mm
• 10 mm
• 12 mm

Light Source:

• 50 W Mercury Lamp

Photocell Wavelength Range:

• 340 – 700 nm

Cathode Sensitivity:

• ≥ 1 µA
• (-2 V ≤ UKA ≤ 0 V)

Anode Dark Current:

• ≤ 5 × 10⁻¹² A
• (-2 V ≤ UKA ≤ 0 V)

Current Range:

• 10⁻⁷ – 10⁻¹³ A
• 3½-Digit Display

Voltage Range:

• Range I: -2 to +2 V
• Range II: -2 to +20 V
• 3½-Digit Display

Voltage Stability:

• ≤ 0.1%

Zero Drift:

• < ±0.2% of Full Scale (10⁻¹³ A Range)
• Within 30 Minutes After Warm-Up

Measurement Methods:

• Zero Current Method
• Compensation Method

Measurement Accuracy:

• 3%

Parts List:

Main Unit:

• Quantity: 1

Electrical Control Unit:

• Quantity: 1

Special BNC Cables:

• Quantity: 2

USB Cable:

• Quantity: 1

Software and User Manual:

• Quantity: 1

Power Cord:

• Quantity: 1

Instruction Manual:

• Quantity: 1

• Manual and Automatic Measurement Modes
• Integrated Design with User-Friendly Operation
• No Crosstalk Between Spectral Lines
• Built-In Data Acquisition System with USB Connectivity
• High Measurement Accuracy
• PC-Based Data Collection and Analysis