Book 3, Question 92 · Video
Why Did Morse Code Use Dots and Dashes?
Morse code turns letters into short beeps, called dots, and long beeps, called dashes, so messages can travel over a wire or in flashes of light. Electricity on a wire is either on
Read the full answer →What Crafty Clover says in this video
Intro
Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why did morse code use dots and dashes?
The Big Idea
Morse code turns letters into short beeps, called dots, and long beeps, called dashes, so messages can travel over a wire or in flashes of light. Electricity on a wire is either on or off. A short on is a dot, and a longer on is a dash. That makes a secret alphabet! The distress signal SOS is three dots, three dashes, and three dots.
Pick a Letter
Step one: pick a letter. Say you want to send the letter S. In Morse code, S is three dots. Each letter has its own pattern!
Tap the Key
Step two: tap the key. Each quick press connects the wire for just a blink of time. The pulse races down the telegraph wire, or goes out as a radio beep.
Ears Decode
Step three: the ears decode. The listener hears dit, dit, dit, and writes down the letter S. A longer pause says, new letter, and then you tap the next code!
A Closer Look
Let's take a closer look at a telegraph! You tap the key. A spring lifts it back up. A battery powers the wire. And at the other end, a sounder clicks, or a paper tape records the dots and dashes!
Quick Facts
Quick facts! Samuel Morse and Alfred Vail built the code in the 1830s. The letter E is a single dot, because it's the most common letter. A dash is 3 times longer than a dot. And you can blink Morse code with a flashlight!
Think Like a Scientist
Now, think like a scientist! Send a secret message. Tap SOS on a table. Have a friend decode your taps without you speaking. Then spell your initials in Morse code. Which letters take the most taps?
Outro
Morse code shows us that just two simple signals can spell out anything. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!