MELC

​Describe how Hertz produced radio pulses ( S11/12PS-IVi-86)

Objectives:

1. describe how Hertz produced radio pulses or radio waves;

2. perform Science investigation: Wave Blockers; and

3. give the uses of radio waves in communications industry

​What is happening to the radio signals in this picture?

1. The force of attraction or repulsion between electric charges is inversely proportional to the square of the distance between them.

2. Magnetic poles come in pairs that attract and repel each other, much as electric charges do.

​Four main Interactions of electromagnetic forces

3. An electric current in a wire produces a magnetic field whose direction depends on the direction of the current.

4. A moving electric field produces a magnetic field and vice versa

​Four main Interactions of electromagnetic forces

​Electromagnetic Spectrum

What is Radio Waves?

Heinrich Hertz

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​Conceptual design of Hertz spark-gap transitter

​Thoughts to ponder