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



Tuesday, October 20, 2026

The Voltmeter That Refused to Become Trash



I still remember my first reaction.

WOW.

I had never seen a voltmeter this large before.

Perhaps I'm not old enough.

Perhaps I simply didn't know what I was looking at.

Either way, it stopped me in my tracks.


Someone once said that history is made up of things that were supposed to be impossible and things that were never supposed to happen.

This instrument belongs to both categories.

It was built in Britain by White Electrical Instrument Co. Ltd., sometime in the 1960s.

It was never meant to survive the age of smartphones, sensors and LCD displays.

It was certainly never meant to be rediscovered and introduced again like the launch of a modern tech gadget.

And yet, here it is.

Alive.


The story becomes even stranger.

During a school clean-up, this giant voltmeter was destined for the rubbish pile.

Fortunately, my laboratory assistant intercepted it.

Instead of throwing it away, she displayed it in the new laboratory.

Years later, it quietly found its way into my Heritage Lab Museum.


Look carefully.

The lower half is almost entirely transparent.

No plastic casing hiding the mechanism.

No sealed electronics.

No mystery.

The engineers wanted students to see everything.

The needle.

The tension wire.

The movement.

The Physics.

In today's world, we see the number.

In the 1960s, students were invited to see how the number came into existence.


Bringing History to Your Screen

I specially transformed this vintage electrical treasure into an exclusive Desktop Background using Gen AI, capturing both its mechanical soul and dark museum aesthetic.

If you are reading this and share a passion for vintage scientific instruments, you are more than welcome to download it for your computer desktop.

🖥️ Exclusive Heritage Wallpapers (Desktop Edition)
High-Resolution Gen-AI Enhanced Vintage Voltmeter Art

📥 Download Desktop Wallpaper Now

"Not by sight, but by INSIGHT. Let history inspire your screen and your studies."

✍️ Posted by Cikgu LimCY | AHA! Physics Moments

Monday, October 19, 2026

Finding Balance in Chaos: The Physics of Staying Calm Before Exams

 

Finding Balance in Chaos - Art Version
🎨 AHA! Physics Moments | 3D Needle Felt Art Edition

Finding Balance in Chaos

Do you feel overwhelmed?
Stressed?
Like everything is happening at once?

Exams.
Assignments.
Expectations.
Noise.
Chaos.

Many years ago, after a laboratory session, one of my students quietly stacked a few stones on the lab bench.

No instructions.
No purpose.
Just curiosity.

I stopped, looked, and took a photograph.
Years later, I turned that simple moment into the artwork you see here.

What amazed me was this:
The stones were not balanced because they were perfect.
They were balanced because each stone found its place.

Physics calls it the centre of gravity.
Life calls it balance.

Sometimes we think we need to fix everything before we can feel calm.
Maybe not.
Maybe balance is not about controlling every problem.
Maybe balance is simply learning what deserves our energy and what does not.

"To every student facing examinations:
You do not need to carry the whole mountain today.
Just focus on the next stone.
Then the next.
Then the next.
One careful step at a time."

In the Mirror of Time: The Original Laboratory Moment

The quiet bench in Limbang, 2020. Where art meets reality.

In the Mirror of Time (时光似镜)

 



À la recherche du temps perdu. 

Young readers, forgive me.

Lately, I seem to keep showing you old laboratory artefacts.

A rheostat from Britain.

A spring balance still remembering Dynes.

Cotton thread wound on a wooden spool.

Forgotten compasses from Japan.

And today, a humble Chinese-made Diamond mechanical stopwatch.

Perhaps this is what happens when one reaches a certain stage of life.

One starts looking back.


At first, I told myself that my Heritage Lab Museum was about preserving old laboratory equipment.

Documenting vintage apparatus before they disappear.

Saving a few stories from being forgotten.

But standing before this stopwatch, I found myself asking a more uncomfortable question:

Am I preserving history, or merely resisting time?

After all, no museum can bring back the past.

No photograph can recreate a lesson that ended forty years ago.

No artefact can rewind a life.

The hands of a stopwatch can be reset.

Time cannot.


Yet the longer I spend among these forgotten objects, the more I realise that they are not really about science.

They are mirrors.

And every mirror reflects something different.

The old British cotton thread whispers of a generation that refused to compromise, believing that even the smallest component deserved the highest standard.

The heavy spring balance reminds me that physics was once something students could see and feel, not merely read from a screen.

The worn rheostat speaks of craftsmanship built to survive decades.

Together, they tell a story.

Not about equipment.

About values.


And that is what troubles me.

Many laboratories today are modern.

Better equipped.

More digital.

More efficient.

Yet sometimes I wonder whether we are witnessing something deeper:

a laboratory that has become technologically advanced,

but spiritually disconnected from its own past.

Our students may never know how much care, thought and craftsmanship previous generations invested simply to measure a force, time an oscillation, or reduce an error by a fraction of a unit.

They inherit the answers.

But not always the struggle that produced them.

------------------------------------------------------------------------------------------------

One day, this stopwatch will stop.

So will I.

So will every generation that came before us.

But perhaps memory has a purpose.

Not to defeat time.

Only to ensure that something worth remembering continues to travel through it.

Not by nostalgia, but by LEGACY. ⏱️