ACARA v9 CONTENT DESCRIPTION “examine why advances in science are often the result of collaboration or build on the work of others”
Builds on seeing how science explanations grow from evidence. Now we look at who does that work. A big advance in science is hardly ever the work of one lonely genius. People collaborate, share what they find, and build on the work of those who came before them. We follow the story of light to see exactly how that happens.
No single person worked out light alone
Our understanding of light took hundreds of years and many people to build up. One person noticed that light travels in straight lines, which is why shadows have sharp edges. Another studied how light bounces off a flat surface so you can see yourself in a mirror. Another worked out how light bends when it passes through clear glass. Each one started from what the people before them had already found, and each one shared what they learned so the next person could carry it further.
How our understanding of light was built up
Add each new worker's finding in turn and watch the explanation of light grow as people build on those who came before.
New evidence (1 of 4)
An early observer notices that light from the sun makes sharp shadows, and a beam through a gap stays in a tidy line.
Accepted model: Light travels in straight lines. This first finding gives everyone after them a place to start.
Add the next piece of evidence and watch whether the accepted model holds or has to change.
Lenses got better as people built on each other
Once people understood that a curved lens bends light, they could make telescopes. But the first telescope was weak. As more glass makers and observers shared their tricks and built on each other's lenses, the telescopes grew far more powerful, letting astronomers see fainter and more distant things. The graph below shows how much further people could see as each generation built on the work of the last.
How far telescopes could see, generation by generation
Switch between the table, the bar chart and the line graph. Each generation of lens makers built on the last, so the reach kept climbing.
Each generation of glass makers and observers did not start from nothing. They built on the lenses and notes shared by the people before them, so the reach of a telescope climbed steeply from one generation to the next. The rising line is the picture of collaboration: many hands building on each other, not one genius working alone.
Working alone, or sharing the work?
Imagine you have just made one careful new finding about light. You could keep it to yourself and try to work out everything else on your own, or you could share it so other scientists can check it and build on it. Each choice has an upside and a downside. Picking a path shows the real trade-off that scientists weigh.
Should you share your new finding, or keep it to yourself?
You have made one careful finding about light. Choose how to work and see what you gain and what you give up.
You have measured something new about how light bends through glass. You can keep working on it alone, share it with a few trusted workers, or share it openly with all scientists. Which way of working will you choose?
Choose a response to see what is gained and what is given up.
Collaboration, or the lone-genius myth?
People sometimes tell the story of science as one brilliant person doing it all alone. The real story is usually collaboration and building on others. Some of the statements below show how science really advances, and some repeat the lone-genius myth. Sort each one into whether it shows collaboration and building on others, or not.
Which statements show how science really advances?
Real advances come from collaboration and building on earlier work. Decide which statements show that, and which repeat the lone-genius myth.
Claim: Big advances in science usually come from collaboration and from building on the work of those who came before.
The worker who studied reflection started from the earlier finding that light travels in straight lines, rather than from nothing.
Glass makers shared their best lens-shaping tricks, so each new batch of lenses was better than the last.
Astronomers published their telescope measurements so other astronomers could check them and build on them.
The telescope was dreamed up overnight by one genius who needed no earlier work and told no one.
A real scientist never reads the findings of others and never shares their own with the world.
Decide whether each statement is evidence for the claim, or not.
Why this matters
The story of light, from straight lines to mirrors to lenses to telescopes, is the story of how science really works. Each person built on the findings shared before them, and shared their own so the next person could go further. A big advance is almost never one lonely genius. It is a long chain of people collaborating and building on the work of others, which is what lets human understanding grow far beyond what any single person could reach.
Quick self-check
1. One observer found that light travels in straight lines. Why was that early finding still important, even though it did not explain everything about light?
2. The telescope was not invented by one lonely genius in a single day. What is the better way to describe how it came about?
3. A scientist makes a careful measurement and then shares it with other scientists. Why is sharing the finding so useful?
4. Why can a group of observers who pool their measurements often build a stronger explanation than a single observer working alone?
5. What is the best summary of how big advances in science usually happen?