Category Archives: Explanation

How many atoms does it take for an element to become visible to the naked eye?

Let’s jump right in on this and start with the diameter of an atom. Atoms measure from 0.1 to 0.5 nanometers (nm) across (0.1 nm written out fully is 0.0000000001 metres). You won’t be surprised to hear that humans can’t

How many atoms does it take for an element to become visible to the naked eye?

Let’s jump right in on this and start with the diameter of an atom. Atoms measure from 0.1 to 0.5 nanometers (nm) across (0.1 nm written out fully is 0.0000000001 metres). You won’t be surprised to hear that humans can’t

The future of computing could exist in a tablespoon of liquid

What do you think of when you think of technology, computing, data storage, and all that goes with it? We live in a world of hard drives and solid-state technology, all silicon-and-copper based. But what if that all changed? Researchers

The future of computing could exist in a tablespoon of liquid

What do you think of when you think of technology, computing, data storage, and all that goes with it? We live in a world of hard drives and solid-state technology, all silicon-and-copper based. But what if that all changed? Researchers

How does radar work?

RADAR stands for Radio Detection And Ranging: a fairly accurate description of what it actually does. Radar systems use radio waves to find out the distance of an object, its speed and direction, and its height. You’ll have experienced something

How does radar work?

RADAR stands for Radio Detection And Ranging: a fairly accurate description of what it actually does. Radar systems use radio waves to find out the distance of an object, its speed and direction, and its height. You’ll have experienced something

How big would a comet have to be, to be able to collide with the sun?

Asked by Tobias, Copenhagen The basic answer to this question is simple: any size of comet – or any other object floating around in space – can end up colliding with the Sun. A lot of comets manage to avoid

How big would a comet have to be, to be able to collide with the sun?

Asked by Tobias, Copenhagen The basic answer to this question is simple: any size of comet – or any other object floating around in space – can end up colliding with the Sun. A lot of comets manage to avoid

There’s now an LED that’s only 3 atoms thick

This is just crazy: a team of scientists from the University of Washington have created an LED (light-emitting diode) that’s only 3 atoms thick. The light emitted can be picked up by standard light-measuring equipment, too. LEDs are basically semiconductors,

There’s now an LED that’s only 3 atoms thick

This is just crazy: a team of scientists from the University of Washington have created an LED (light-emitting diode) that’s only 3 atoms thick. The light emitted can be picked up by standard light-measuring equipment, too. LEDs are basically semiconductors,

Can you see a star which is only 10 years old, and how old does a star have to be for us to see it?

Asked by Danielle, Melbourne The stars in our Universe are so far away that it can take years for their light to reach us here on Earth. We get light years as a measure of distance from this: one light year

Can you see a star which is only 10 years old, and how old does a star have to be for us to see it?

Asked by Danielle, Melbourne The stars in our Universe are so far away that it can take years for their light to reach us here on Earth. We get light years as a measure of distance from this: one light year

The best of both worlds: wind turbines shooting lightning into a storm

This is a seriously cool phenomenon: wind turbines in the centre of a lightning storm are actually shooting lightning bolts back into the sky. Lightning is caused by a build-up of static electricity in the clouds, creating a difference in

The best of both worlds: wind turbines shooting lightning into a storm

This is a seriously cool phenomenon: wind turbines in the centre of a lightning storm are actually shooting lightning bolts back into the sky. Lightning is caused by a build-up of static electricity in the clouds, creating a difference in