Light & Color
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 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 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
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.
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.
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
- 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
- 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
MS-PS4-2
This episode info was written and fact-checked by Seriously Scientific. Science updates reflect current understanding as of 2026.
Bill Nye The Science Guy
02 // EPISODE_INDEX100 remastered episodes across 5 seasons of science education
Season 1 (20 episodes)
Bill Nye The Science Guy | Flight
Bill Nye The Science Guy | Earth's Crust
Bill Nye The Science Guy | Dinosaurs
Bill Nye The Science Guy | Skin
Bill Nye The Science Guy | Buoyancy
Bill Nye The Science Guy | Gravity
Bill Nye The Science Guy | Digestion
Bill Nye The Science Guy | Phases of Matter
Bill Nye The Science Guy | Biodiversity
Bill Nye The Science Guy | Simple Machines
Bill Nye The Science Guy | The Moon
Bill Nye The Science Guy | Sound
Bill Nye The Science Guy | Garbage
Bill Nye The Science Guy | Structures
Bill Nye The Science Guy | Earth's Seasons
Bill Nye The Science Guy | Light & Color
Bill Nye The Science Guy | Cells
Bill Nye The Science Guy | Electricity
Bill Nye The Science Guy | Outer Space
Bill Nye The Science Guy | Eyeballs
Season 2 (20 episodes)
Bill Nye The Science Guy | Magnetism
Bill Nye The Science Guy | Wind
Bill Nye The Science Guy | Blood & Circulation
Bill Nye The Science Guy | Chemical Reactions
Bill Nye The Science Guy | Static Electricity
Bill Nye The Science Guy | Food Webs
Bill Nye The Science Guy | Light Optics
Bill Nye The Science Guy | Bones & Muscle
Bill Nye The Science Guy | Oceanography
Bill Nye The Science Guy | Heat
Bill Nye The Science Guy | Insects
Bill Nye The Science Guy | Balance
Bill Nye The Science Guy | The Sun
Bill Nye The Science Guy | The Brain
Bill Nye The Science Guy | Forests
Bill Nye The Science Guy | Communication
Bill Nye The Science Guy | Momentum
Bill Nye The Science Guy | Reptiles
Bill Nye The Science Guy | Atmosphere
Bill Nye The Science Guy | Respiration
Season 3 (21 episodes)
Bill Nye The Science Guy | Planets & Moons
Bill Nye The Science Guy | Pressure
Bill Nye The Science Guy | Plants
Bill Nye The Science Guy | Rocks & Soil
Bill Nye The Science Guy | Energy
Bill Nye The Science Guy | Evolution
Bill Nye The Science Guy | The Water cycle
Bill Nye The Science Guy | Friction
Bill Nye The Science Guy | Germs
Bill Nye The Science Guy | Climates
Bill Nye The Science Guy | Waves
Bill Nye The Science Guy | Ocean Life
Bill Nye The Science Guy | Mammals
Bill Nye The Science Guy | Spinning Things
Bill Nye The Science Guy | Fish
Bill Nye The Science Guy | Human Transportation
Bill Nye The Science Guy | Wetlands
Bill Nye The Science Guy | Birds
Bill Nye The Science Guy | Populations
Bill Nye The Science Guy | Animal Locomotion
Bill Nye The Science Guy | Invertebrates
Season 4 (19 episodes)
Bill Nye The Science Guy | Rivers & Streams
Bill Nye The Science Guy | Nutrition
Bill Nye The Science Guy | Marine Mammals
Bill Nye The Science Guy | Earthquakes
Bill Nye The Science Guy | NTV Music Videos
Bill Nye The Science Guy | Spiders
Bill Nye The Science Guy | Pollution Solutions
Bill Nye The Science Guy | Probability
Bill Nye The Science Guy | Pseudoscience
Bill Nye The Science Guy | Flowers
Bill Nye The Science Guy | Archaeology
Bill Nye The Science Guy | Deserts
Bill Nye The Science Guy | Amphibians
Bill Nye The Science Guy | Volcanoes
Bill Nye The Science Guy | The Heart
Bill Nye The Science Guy | Inventions
Bill Nye The Science Guy | Computers
Bill Nye The Science Guy | Fossils
Bill Nye The Science Guy | Time
Season 5 (20 episodes)
Bill Nye The Science Guy | Forensics
Bill Nye The Science Guy | Space Exploration
Bill Nye The Science Guy | Genes
Bill Nye The Science Guy | Architecture
Bill Nye The Science Guy | Farming
Bill Nye The Science Guy | Life Cycles
Bill Nye The Science Guy | The Scientific Method
Bill Nye The Science Guy | Atoms
Bill Nye The Science Guy | Ocean Exploration
Bill Nye The Science Guy | Lakes and Ponds
Bill Nye The Science Guy | Smell
Bill Nye The Science Guy | Caves
Bill Nye The Science Guy | Erosion
Bill Nye The Science Guy | Fluids
Bill Nye The Science Guy | Comets and Meteors
Bill Nye The Science Guy | Measurement
Bill Nye The Science Guy | Patterns
Bill Nye The Science Guy | Storms
Bill Nye The Science Guy | Music
Bill Nye The Science Guy - Motion
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Interactive Science Lesson
Based on: Light & Color
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!
Light vs. Paint: What's the Diff?
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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)
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
Absorbs Most Light (Gets Warmer)
Reflects Most Light (Stays Cooler)
Science Word Search
Find these words:
Pop Quiz!
Quiz Complete!
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
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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
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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?
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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!
Episode Discussion
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