A green pepper looks green to your eyes because its skin...

Reflects green light and absorbs others

If you mix primary paint colours like red, yellow, and blue together, what happens?

They make a dark, murky colour like brown

Why does a black t-shirt feel warmer in the sun than a white one?

It absorbs more light energy, turning it into heat.

Black fabric is naturally thicker.

How do neon signs like the ones you see in cities create their bright colours?

By passing electricity through a gas in a tube

They have a special paint that glows

Why do concert venues often use smoke or fog machines during a laser show?

To give the laser beams something to reflect off

What causes the beautiful, swirling rainbow colours you can see on the surface of a soap bubble?

Light waves interfering as they reflect

The bubble acting like a tiny prism

According to Bill, how are the waves of red light different from the waves of blue light?

Red light waves are longer and slower

Red light waves are shorter and faster

There is no difference in their waves

Only blue light travels in waves

The sky appears blue on a clear day because molecules in the air do what to the sun's light?

Scatter blue light more than other colours.

Absorb all colours except blue.

The ocean reflects onto the sky.

Light & Color

Season 01

Episode 16

Duration 23:05

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⭐ Interactive Lesson ⭐

White light might look plain, but it is actually a hidden rainbow waiting to be set free. In this episode of Bill Nye The Science Guy, Bill explores the brilliant world of light and colour. Viewers will discover how prisms work, why apples are green, and how light waves create the vibrant world we see every day.

The Full Spectrum

Bill demonstrates how white light contains every colour of the rainbow. He shines a bright light through a water-filled prism, bending the light to reveal the full visible spectrum. He shows that pure colours like red and blue cannot be broken down any further.

Bill Nye wearing a light blue lab coat and bow tie juggling a red pepper, an orange, and a green apple at a fruit market stall to demonstrate colour reflection.

Bill Nye juggles a pepper, an apple, and an orange to explain how objects reflect specific colours of light in Season 1 Episode 16 of Bill Nye The Science Guy, remastered in 4K at seriouslyscientific.com

Reflection and Absorption

Why is a red pepper red? Bill explains that the chemicals in the skin of fruits and vegetables absorb most wavelengths of light. They only reflect specific colours back to our eyes. He juggles an apple, an orange, and a pepper to show how everyday objects get their colour.

Mixing Light and Paint

Bill highlights a crucial difference between mixing light and mixing paint. Mixing red, green, and blue light creates pure white light. However, mixing those same colours of paint creates a messy brown because paint contains pigments that absorb light instead of emitting it.

Bill Nye holding up a hand covered in colourful paint above graphic blocks spelling out the letters R O Y G B.

Bill Nye explains the colours of the visible spectrum in Season 1 Episode 16 of Bill Nye The Science Guy, remastered in 4K at seriouslyscientific.com

Pigments and the Spectrum

A visit to a crayon factory reveals how dyes and pigments are carefully mixed to create distinct colours. Bill also shares a handy trick to remember the order of the visible spectrum using the name ROY G. BIV, which stands for red, orange, yellow, green, blue, indigo, and violet.

Key Scientific Concepts

Concept 01
The Visible Spectrum
White light is a mixture of all the colours in the rainbow. A prism bends this light, separating it into distinct wavelengths like red, yellow, green, and blue.

Concept 02
Light Reflection
Objects appear to be a certain colour because of how they interact with light. A blue object will reflect blue light waves while absorbing all the other colours in the spectrum.

Concept 03
Light Waves
Light travels as a wave of energy. Different colours have different wavelengths, with red light having long slow waves and blue light having short fast waves.

Quick Science Facts

⚡ Quick Science Facts from This Episode

White light is a mixture of all the distinct colours of the rainbow.
Mixing red and blue food colouring in water will create purple.
Combining all the primary colours of light together produces pure white light.
Black clothes absorb almost all colours of light and convert them into heat.
White clothes reflect all colours of light and absorb very little heat.
Smoke is used at dance parties so that laser beams have particles to bounce off and become visible.

Science Updates Since This Episode First Aired

🔬 What Science Knows Now

LED technology has completely transformed global lighting since 1993, using semiconductors rather than heated filaments or excited neon gas to create specific colours of light efficiently.
Scientists have engineered ultra-black materials using carbon nanotubes that absorb over 99.99 percent of visible light, taking the concept Bill discusses about black clothing to the extreme.
Researchers now use the principles of light scattering, similar to what makes the sky blue, to develop advanced medical imaging techniques that detect diseases without X-rays.
While Bill focuses on the visible spectrum, telescopes like the James Webb Space Telescope now capture invisible infrared light to reveal the vibrant colours of newly forming stars billions of light-years away.

📋

NGSS Alignment

This episode covers Next Generation Science Standards for middle school physical science relating to light waves and electromagnetic radiation.

MS-PS4-1
MS-PS4-2

This episode info was written and fact-checked by Seriously Scientific. Science updates reflect current understanding as of 2026.

Interactive Science Lesson

Based on: Light & Color

Bill Nye - Light and Colour Interactive

The Basics: What's the Deal with Colour?

Bill breaks down the fundamental ideas you need to know about light and colour. Click the cards to flip 'em!

🌈

What is White Light?

Click to Reveal

It's a Rainbow in Disguise!

White light, like sunlight, isn't actually white. It's a mixture of all the colours of the rainbow! A prism can split the light and show you the whole spectrum: Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

🍎

Why is an Apple Red?

Click to Reveal

It's All About Bouncing!

We don't see objects, we see light bouncing off them! An apple's skin has chemicals that absorb all the colours of light *except* for red. The red light reflects, or bounces, off the apple and into your eyes. That's why it looks red!

💡vs🎨

Light vs. Paint: What's the Diff?

Click to Reveal

Adding vs. Subtracting

Mixing light is *additive* – when you mix Red, Green, and Blue light, you add them all up to get white light. Mixing paint is *subtractive*. Each pigment absorbs colours, so when you mix them, they absorb more and more light until you get a dark, murky brown or black.

Bill's Colour Lab

Explore the difference between adding light and subtracting with paint. Drag the light sources and mix the paints to see science in action!

Additive Mixing (Light)

Subtractive Mixing (Paint)

Your Palette

Fun & Games!

Time to put your colourful knowledge to the test. Let's play!

Sorting Challenge: Absorb vs. Reflect

Drag the items to the correct bin. Which ones absorb almost all light, and which ones reflect it?

Items

📄 White Paper

👕 Black Shirt

⚫ Charcoal

☁️ White Cloud

Absorbs Most Light (Gets Warmer)

Reflects Most Light (Stays Cooler)

Science Word Search

Find these words:

Pop Quiz!

Science Since the 90s

The science of light and colour has gotten even cooler since Bill's show first aired. Check out these bright ideas!

📱

Brighter, Thinner Screens

Click to Reveal

OLED Technology

Your smartphone screen likely uses OLEDs (Organic Light-Emitting Diodes). Unlike old TVs, each tiny pixel makes its own light! This means they can be turned off completely for perfect blacks and amazing contrast, all in a super-thin package.

💎

Colour from Tiny Crystals

Click to Reveal

Quantum Dots

"QLED" TVs use quantum dots—nanoparticles that glow a very specific, pure colour when light hits them. By precisely controlling the size of these dots, scientists can create displays with an incredibly wide and accurate range of colours, making images look more lifelike than ever.

🦋

Painting with... Structure?

Click to Reveal

Meta-materials & Structural Colour

Inspired by butterfly wings, scientists now create materials with microscopic patterns that bend light to produce colour without any pigments or dyes. This "structural colour" never fades and could lead to colour-changing clothes, better e-readers, and advanced camouflage!