Percobaan Sinar Katoda ❷ Massa

Introduction

This tutorial will guide you through an experiment to demonstrate that cathode rays are not merely electromagnetic waves, but rather possess mass. This experiment is beneficial for students and enthusiasts of physics who want to understand the properties of cathode rays better.

Step 1: Gather Your Materials

To conduct the experiment, you will need the following materials:

• A cathode ray tube (CRT)
• A power supply
• A vacuum pump (to create a vacuum in the CRT)
• A scale or balance (for measuring mass)
• A metal target (like a thin foil)
• Connecting wires

Practical Advice

• Ensure all materials are in good condition and safe to use.
• Set up your workspace in a well-ventilated area to avoid any hazards.

Step 2: Set Up the Cathode Ray Tube

1. Prepare the CRT:

   • Connect the cathode ray tube to the power supply.
   • Ensure it is securely attached to prevent any accidents during the experiment.

2. Create a Vacuum:

   • Use the vacuum pump to remove air from the CRT. This step is crucial as it allows cathode rays to travel without obstruction from air molecules.

Practical Advice

• Double-check that all connections are tight to avoid any leaks in the vacuum.
• Monitor the pressure inside the CRT using a gauge.

Step 3: Activate the Cathode Ray Tube

1. Turn on the Power:

   • Switch on the power supply to activate the cathode rays within the tube.

2. Observe the Rays:

   • Look for the glow or light produced by the movement of electrons in the tube. This indicates that the cathode rays are functioning.

Common Pitfalls

• If you do not see any glow, check your connections and ensure the vacuum is properly maintained.
• Make sure the power supply is functioning correctly.

Step 4: Conduct the Experiment

1. Place the Metal Target:

   • Position the metal foil in the path of the cathode rays.

2. Measure the Deflection:

   • Observe the impact of the cathode rays on the metal foil. Note any physical changes, such as bending or displacement.

3. Use the Scale:

   • If applicable, measure any mass displacement or changes in the target material before and after the experiment.

Practical Advice

• Record all observations in a notebook for further analysis.
• Repeat the experiment multiple times for consistency in results.

Step 5: Analyze Your Results

1. Evaluate the Evidence:

   • Discuss whether the observed effects support the idea that cathode rays have mass.
   • Compare your findings with existing literature or theories on cathode rays.

2. Draw Conclusions:

   • Based on your observations, conclude whether the experiment supports the hypothesis that cathode rays possess mass.

Real-World Applications

• Understanding cathode rays can lead to insights in various fields including electronics, medical imaging, and particle physics.

Conclusion

In this tutorial, you learned how to conduct an experiment to demonstrate that cathode rays possess mass. By gathering the necessary materials, setting up the CRT, and performing careful observations, you can reveal the fundamental properties of cathode rays. Consider exploring further experiments to deepen your understanding of atomic physics or related concepts.