Grade 9 Science | Waves and Information Technology | Sound, Light & Digital Communication

Description:
In this engaging topic, students dive into the science of waves — how they travel, transfer energy, and shape our modern world. We cover mechanical and electromagnetic waves, including sound waves, light waves, radio waves, and microwaves.

Students learn the key properties of waves — wavelength, frequency, amplitude, and speed — and how they are used in technologies like cell phones, Wi-Fi, fiber optics, and medical imaging. We explain the difference between analog and digital signals, showing why digital communication is faster and more reliable.

This topic connects physics with real-world tech, helping students understand how wave science powers the internet, satellites, and communication systems. By the end, learners will see waves not just as a physics concept, but as the invisible force driving our connected world.