Shadowing Practice: Why Walls STOP Light Waves But Not Radio Waves? - Learn English Speaking with Video

Choose a practice mode

Each mode opens a full-screen practice room.

39 sentences
If sentences are too short or too long, click Edit to adjust them.
1
Have you ever wondered why radio signals can easily pass through the walls of your house, allowing you to listen to a radio station indoors,
2
while visible light cannot pass through the same walls?
3
If light is also an electromagnetic wave, why is it blocked by bricks, but radio waves are not?
4
To answer this question, we first need to understand the electromagnetic spectrum.
5
The electromagnetic spectrum is simply a collection of all types of electromagnetic waves arranged according to their frequency or wavelength.
6
It includes radio waves, microwaves,
7
infrared waves, visible light, ultraviolet rays, X-rays, and gamma rays.
8
Although these waves have different names, they are all the same type of wave.
9
The only difference between them is their frequency and wavelength.
10
As we move from radio waves toward gamma rays, the frequency keeps increasing.
11
You can think of frequency as how fast the wave is oscillating or wiggling.
12
A higher frequency means the wave completes more oscillations every second.
13
Therefore, visible light or gamma rays have a much higher frequency than radio waves.
14
Now, in quantum physics, electromagnetic waves are not only treated as waves, but also as tiny packets of energy called photons.
15
You can think of a photon as the smallest packet of light or electromagnetic energy.
16
Every type of electromagnetic wave is made up of photons.
17
However, the amount of energy carried by each photon depends on the frequency of the wave.
18
This relationship is given by Planck's famous equation,
19
which states that the energy of a photon is equal to Planck's constant multiplied by its frequency.
20
Since Planck's constant is just a fixed number, the only quantity that changes is the frequency.
21
Therefore, as the frequency increases, the energy of each photon also increases.
22
Since radio waves have a very low frequency, each radio photon carries a very small amount of energy.
23
On the other hand, visible light has a much higher frequency, so each visible light photon carries much more energy.
24
X-rays and gamma rays have even higher frequencies, which means their photons are even more energetic.
25
To understand why this matters, let us now look at what happens inside a brick.
26
Every brick is made up of atoms, and each atom contains electrons.
27
According to Bohr's atomic model, these electrons can exist in their orbits only in certain allowed energy levels.
28
They can move to a higher energy level only if they receive exactly the required amount of energy.
29
Now imagine a radio photon striking a brick.
30
Since the energy carried by a radio photon is extremely small, it is not enough to excite the electrons inside the atoms of the brick.
31
The electrons simply ignore the incoming photon because it does not provide the required energy.
32
As a result, the radio wave passes through the brick with very little interaction.
33
Now, consider a photon of visible light.
34
The energy carried by a visible light photon is much closer to the energy required to excite the electrons inside the atoms.
35
Therefore, when visible light strikes the brick, many electrons absorb this energy and become excited.
36
During this interaction, the light is absorbed, reflected, and scattered in different directions instead of passing straight through.
37
This is why you cannot see through the walls of your house.
38
That is the fundamental reason why radio signals can enter your house, while visible light cannot.
39
Like, share, and subscribe for more such amazing concepts. So good!

Download App

Everything you need to speak fluently

AI PronunciationScore every sentence
IPA PracticeMaster every sound
VocabularyBuild your word bank
Vocab GameLearn while playing
Scan QR
Scan QR
Download on theApp StoreGet it onGoogle Play

Same Channel

Super Simple Explanation of Probability Tree Diagram!B1
2

Super Simple Explanation of Probability Tree Diagram!

Daily ConversationHigh School Students
Grade 11: Conditional ProbabilityC1
19

Grade 11: Conditional Probability

High School Students
Every Machine Learning Model Explained in 15 minutesC1

Every Machine Learning Model Explained in 15 minutes

Business EnglishUniversity StudentsWorking Adults
FOR YOU

Recommend Video

Why a Song Gets Stuck in Your HeadB2
135
17 sentences

Why a Song Gets Stuck in Your Head

American AccentDaily ConversationUniversity StudentsWorking Adults
The Uncertainty Principle: What Does It Mean, How Does It Work?C1
182 sentences

The Uncertainty Principle: What Does It Mean, How Does It Work?

Daily ConversationUniversity StudentsWorking Adults
Why It Was Almost Impossible to Make the Blue LEDC1
1
337 sentences

Why It Was Almost Impossible to Make the Blue LED

Daily ConversationUniversity StudentsWorking Adults
Something is jamming GPS over Europe. Here's what we foundC1
1
396 sentences

Something is jamming GPS over Europe. Here's what we found

Daily ConversationUniversity StudentsWorking Adults
We Found Galaxies Too Old for the UniverseC1
2
47 sentences

We Found Galaxies Too Old for the Universe

Daily ConversationUniversity StudentsWorking Adults
Traceroute: You're Probably Reading the Results WrongC1
1
54 sentences

Traceroute: You're Probably Reading the Results Wrong

Daily ConversationUniversity StudentsWorking Adults
What If a Needle Hit The Earth At The Speed Of Light?B2
1
208 sentences

What If a Needle Hit The Earth At The Speed Of Light?

Daily ConversationUniversity StudentsWorking Adults
Why is Nuclear Fusion so Hard? - Nuclear Engineer Explains #nuclearB2
3
7 sentences

Why is Nuclear Fusion so Hard? - Nuclear Engineer Explains #nuclear

Daily ConversationUniversity StudentsWorking Adults
Diodes Explained - The basics how diodes work working principle pn junctionC1
1
7 sentences

Diodes Explained - The basics how diodes work working principle pn junction

Daily ConversationUniversity StudentsWorking Adults
How Quantum Batteries Break Every Rule of ChargingC1
8
156 sentences

How Quantum Batteries Break Every Rule of Charging

Daily ConversationUniversity StudentsWorking Adults
Your brain wasn't built to hold this much information | Richard CytowicC1
3
235 sentences

Your brain wasn't built to hold this much information | Richard Cytowic

Daily ConversationUniversity StudentsWorking Adults
Why is hot air WAVY? (only for curious)B2
2
32 sentences

Why is hot air WAVY? (only for curious)

Daily ConversationWorking Adults

Why This Video Is Great for Learning English with YouTube

If you’re looking to improve English pronunciation or practice conversational skills, this video is a goldmine. It blends simple explanations with scientific terms, making it perfect for IELTS speaking practice—you’ll learn to discuss complex ideas clearly. The host’s tone is friendly and conversational, so you can easily mimic natural rhythm and intonation. Plus, the topic is relatable (who hasn’t wondered about radio waves vs. light?), keeping you engaged while you learn.

Breaking Down Natural Speech: 3 Key Phrases

  • “Have you ever wondered why radio signals can easily pass through the walls of your house…” This opening question is a classic way to hook listeners. Notice the casual “ever wondered” and the flow of “easily pass through”—it’s how native speakers start a conversation, not just a lecture. Practice saying it slowly to nail the rising intonation at the end.
  • “You can think of frequency as how fast the wave is oscillating or wiggling.” The phrase “you can think of” is a great tool for simplifying ideas, which is crucial for IELTS speaking. The word “wiggling” adds a casual touch, showing that even technical topics can be spoken naturally. Repeat this to master the pause between “oscillating” and “or.”
  • “That is the fundamental reason why radio signals can enter your house, while visible light cannot.” This closing statement uses “that is the fundamental reason” to wrap up an explanation—perfect for structuring arguments. The contrast “while” helps clarify differences, a skill examiners love. Focus on stressing “fundamental” and “cannot” for emphasis.

A Simple Shadowing Routine for This Video

Shadowing (or “shadowspeak”) is a proven way to boost pronunciation and fluency. Here’s how to use this video: 1. Watch a 10-second clip, then pause. 2. Repeat the host’s words immediately, copying their tone, speed, and pauses. 3. Record yourself, then compare it to the video. Notice if you missed any “ums” or “ahs”—native speakers use these, and they make you sound more natural! 4. Do this for 5 minutes daily, focusing on the phrases above. Over time, you’ll start speaking with the same ease as the host, making it great for learn english with youtube sessions.

Whether you’re prepping for IELTS or just want to sound more confident, this video and routine will help you turn passive listening into active speaking skills.

What is the Shadowing Technique?

Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.

Shadowing technique: read the full step-by-step guide →