Radiant Energy

Let It Shine

Time Warp

Radiant energy is a form of electromagnetic energy. It can take the form of visible waves – which is what we call light energy.

In a Flash

Radiant Energy

Radiant energy is a form of electromagnetic energy. It can take the form of visible waves – which is what we call light energy – or invisible waves such as radio waves or x-rays.

As the charges that cause the energy are moving, electrical energy is a form of kinetic energy.

Lightning, batteries and even electric eels are examples of electrical energy in action!

Burning Questions

What is radiant energy?

Radiant energy is the energy of electromagnetic waves. These waves can travel through space.

Electromagnetic radiation is made up of tiny particles called photons – think of them as little packets of energy.

Light energy is a form of radiant energy that is visible to the human eye.

Does the Sun produce radiant energy?

Yes, the Sun produces a lot of radiant energy, which is transmitted to Earth as light.

Plants convert the electromagnetic energy in sunlight into chemical energy for their food, through a process called photosynthesis.

Light in Hands

Waves of radiant electromagnetic energy can be visible or invisible.

What is light energy?

Light is a visible form of radiant energy that travels in waves. It is the only form of energy that can be seen by the human eye.

Aside from the Sun, light energy is given off by other stars, light bulbs, lasers and hot objects. Light energy is very useful, as it helps us to see the world around us.

Light energy is also very fast – in fact, nothing travels faster!

What are some examples of radiant energy?

The electromagnetic waves that transmit radiant energy can come in all sorts of forms. Light waves are the only type we can see with our eyes.

Here are some examples of radiant energy:

Sunshine'

Sunshine

Solar Cells*

Solar Cells*

X-Rays

X-Rays

Radio Controlled Car

Radio Controlled Car

Car Headlights

Car Headlights

Radiant Heating Systems

Radiant Heating Systems

*Solar cells or panels convert radiant energy from the sun into electricity.

Radiant Energy Electromagnetic Spectrum

Short electromagnetic waves contain more energy than long ones.

What Do You Mean?

Radiant energy is the energy of electromagnetic waves.

Radiation is the emission of energy as electromagnetic waves.

Light energy is a type of radiant energy that can be seen by the human eye.

The Sun is the closest star to the planet Earth and radiates light energy.

Cool Facts

In electromagnetism, short waves have more energy than long waves.

Cool Facts

The longest electromagnetic waves are over 100 kilometres long and the shortest are less than a billionth of a millimetre!

Cool Facts

Light can travel at up to 300,000 kilometres per second. Good luck keeping up with that!

Cool Facts

The word 'photon' comes from the Latin word 'photo' – which means 'light'.

Light on planet surface

Light is just one part of the electromagnetic spectrum, the part that our eyes can see.

Speedy Summary

Radiant energy is the energy of electromagnetic waves. These waves can travel through space and include light waves – the only kind that are visible to humans.