Enroll Course: https://www.coursera.org/learn/radio-waves-in-our-life
Have you ever wondered about the invisible forces that power our modern world? From the convenience of your microwave to the seamless connectivity of your smartphone, radio waves are the unsung heroes of our daily lives. Coursera’s “生活中的電波” (Radio Waves in Life) course offers a fascinating and accessible exploration of this ubiquitous technology.
This course brilliantly demystifies the science behind radio waves, making complex concepts easy to grasp. It begins by delving into the familiar territory of the **Microwave Oven**, explaining the science behind how it heats our food and offering practical safety tips and even small experiments to solidify understanding.
Next, we journey into the world of **Broadcasting**, uncovering the different transmission methods for various radio frequencies and even touching upon the engaging hobby of amateur radio. The course then tackles the technologies that are central to our connected lives: **Cellular Networks, Wi-Fi, and Bluetooth**. It sheds light on the innovations driving these technologies, including the much-discussed 5G, and their impact on our daily routines.
**Wireless Power Transfer and RFID** is another captivating module. While RFID might sound technical, the course connects it to everyday items like the EasyCard used for commuting, revealing the hidden power of these small tags in storing and transmitting information.
The course also explores the critical role of **Radar** (Radio Detection and Ranging). Beyond its cinematic portrayal in military contexts, we learn how radar is essential for weather forecasting, maritime navigation, and even in everyday devices like speed guns and automatic doors.
Understanding how we navigate the world, the course covers the **Global Positioning System (GPS)**, explaining how satellite signals provide precise location data that we rely on daily through our smartphones.
For those with a cosmic curiosity, the **Radio Astronomy** module opens a window into observing the universe. It reveals how radio telescopes are used to study celestial objects, including black holes, that are invisible to the naked eye.
Finally, the course addresses the important topic of **Safety of RF Radiation**. It presents an objective look at the potential effects of electromagnetic waves on the human body, supported by data and research, aiming to alleviate common concerns.
“生活中的電波” is an exceptional course for anyone curious about the science that shapes our modern existence. It’s educational, engaging, and provides a newfound appreciation for the invisible world of radio waves. Highly recommended for students, tech enthusiasts, or simply anyone who wants to understand the technology they use every day.
Enroll Course: https://www.coursera.org/learn/radio-waves-in-our-life