Thursday, October 22, 2026

Let Me Not Live to Be Useless


A humble G-Clamp, dated 27/8/98.

The original object came from my school's Physics laboratory. Using Generative AI, I reimagined it as the artwork above, blending memory, heritage and reflection into a single scene.

At first glance, it looks ordinary.

Heavy.

Rusty.

Outdated.

The kind of tool most people would walk past without a second thought.


Yet for nearly three decades, it has quietly done the same job.

Not measuring.

Not calculating.

Not displaying data.

Simply holding things together.

Firmly.

Patiently.

Without complaint.


In a Physics laboratory, a G-clamp is rarely the star of the experiment.

It does not appear in examination questions.

Students rarely remember it.

But many experiments would not work without it.

Perhaps life is a little like that.

The most important things are not always the most visible.


When I found this old clamp, I could have seen rust.

Instead, I saw resilience.

I saw a tool built long before smartphones, AI, cloud storage and social media.

Yet here it still stands, refusing to let go.


We live in an age obsessed with being noticed.

This old clamp reminds me of a different virtue:

You do not have to be important to be useful.

And you do not have to be visible to make a difference.

For almost thirty years, this clamp did one thing well.

And perhaps that is why it survived.


AHA! Moment

A G-clamp exists to hold things together.

Perhaps the same is true of character.

When pressure comes, what matters is not how bright we shine, but whether we can still hold on.

Not by fame, but by USEFULNESS. 🗜️

 

The Same View, Different Versions of Me


 This was the Physics laboratory where I spent many years teaching.


My new Physics laboratory

Same viewpoint.

Same photographer.

Different laboratories.

Different years.

When I look at these two photographs, I don't really see old and new laboratories.

I see everything that happened in between.

Do we shape the places we inhabit, or do those places quietly shape us?

SPM Physics: AHA! Newton’s Third Law – Equal Means Equal!

 


Students often think a bigger or stronger object exerts a bigger force. That’s wrong. Newton’s Third Law states: forces between two interacting objects are equal in magnitude and opposite in direction.

⚡ Quick Facts (Exam-Ready)

  • Student pushes wall with 50 N → Wall pushes student back with 50 N.

  • Equal magnitude, opposite direction.

  • Bigger object ≠ bigger force.

  • Law applies to all interactions: wall vs student, Earth vs Sun.

👉 Exam keywords: Equal magnitude, Opposite direction.

📐 SPM Scoring Points

1️⃣ Definition: When an object exerts a force on another, the second object exerts an equal and opposite force on the first.
2️⃣ Application: Force by student on wall = force by wall on student (equal and opposite).

AHA! Equal means equal. Not by sight, but by INSIGHT!

#AHAPhysicsMoments #Physics in Life, Life in Physics #SeeWithPhysicsEyes #PhysicsWithInsight


Wednesday, October 21, 2026

The Days of Two Copper Rods

 



There was a time when our Physics laboratory did not have enough apparatus.

Not enough equipment.

Not enough budget.

Sometimes, not even the proper setup shown in the textbook.

So we did what teachers and students have always done when resources were scarce.

We improvised.


What you see in this photograph is not a standard laboratory kit.

It is a collection of borrowed ideas, copper rods, magnets, bits of polystyrene and plenty of optimism.

Together, my students and I tried to build our own version of the current-carrying conductor experiment.

No instruction manual.

No YouTube tutorial.

No simulation.

Just a rough understanding of Physics and a willingness to experiment.


I still remember those afternoons.

Some of the copper rods were bent.

We straightened them together.

Some alignments failed.

We tried again.

The setup looked more like a construction site than a Physics experiment.

Yet nobody complained.

In fact, that was the fun.


And then came the moment.

Power on.

Current flowed.

The wire moved.

For a few seconds, the whole laboratory erupted.

Cheers.

Laughter.

Disbelief.

I can still hear it today.

Not because the experiment was difficult.

But because we made it work.

Together.


Of course, reality was never as neat as the textbook.

Sometimes the current was too large.

A spark appeared.

The students became even more excited.

Sometimes the copper conductor grew hot.

Someone touched it.

An immediate "Aiyo!" echoed across the laboratory.

For a moment, Physics was no longer a diagram.

It was alive.


When I look at this photograph today, I cannot help wondering what we have gained and what we have lost.

Today's students can run a simulation in seconds.

The conductor moves perfectly.

The graph appears instantly.

Nothing bends.

Nothing breaks.

Nobody sweats.

Nobody gets surprised.

Nobody accidentally discovers anything.


Perhaps that is why I treasure this memory.

Not because the experiment was perfect.

It wasn't.

Not because the apparatus was complete.

It definitely wasn't.

But because the joy was real.

The failure was real.

The thinking was real.

And when success finally came, the celebration was real too.

Not by simulation, but by participation. 

P/S: Those wooden stools? Handmade by our principal, Mr Lee Yiing Chiong. Bought nails. Built stools. Built a school. Different times. ❤️


SPM Physics: AHA! Electromagnetic Induction – Faster Magnet, Bigger Deflection!

 


When a magnet is dropped into a coil, the galvanometer deflects. But why does releasing the magnet from a higher height cause a bigger deflection? The answer lies in the rate of change of magnetic flux.

🔑 Quick Facts (Exam-Ready)

  • Higher release height → magnet enters coil faster.

  • Faster magnet → faster change of magnetic flux.

  • Faster flux change → greater induced emf.

  • Greater emf → larger induced current.

  • Larger current → bigger galvanometer deflection.

👉 One-line scoring version:
Higher height → higher speed → faster flux change → greater emf → greater current → bigger deflection.

AHA! Faster magnet, bigger deflection. Not by sight, but by INSIGHT!

#AHAPhysicsMoments #Physics in Life, Life in Physics #SeeWithPhysicsEyes #PhysicsWithInsight