What happens to the cathode rays under a strong magnetic field or an electric field ? What is conclusion made from this ?

Explanation

### Step-by-Step Solution:

1. **Understanding Cathode Rays**:
- Cathode rays are streams of electrons emitted from the cathode in a vacuum tube. They are negatively charged particles.

2. **Effect of a Strong Magnetic Field**:
- When cathode rays pass through a strong magnetic field, they experience a force due to the Lorentz force law. This force acts perpendicular to both the direction of the magnetic field and the direction of the cathode rays.
- As a result, the cathode rays will bend or change their path instead of continuing in a straight line.
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