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What is this glowing bubbles?

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That's so me! Are you Mrs. Neal?

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Yes I am, and you must be the treehouse detectives.

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Yes we are.

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Wow, look at those bubbles. It looks like a rainbow.

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You were just talking about the colors of a rainbow.

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How can I help you?

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We need to know more about the visible spectrum.

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Tell me what you've learned so far.

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Waves have different frequencies.

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And different frequencies mean different colors.

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Each of the waves and the frequencies is called the electromagnetic spectrum.

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The part that our eyes can see is only a very small part of the electromagnetic spectrum.

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And that's the part we call visible spectrum.

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That makes sense.

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Would the other parts of the spectrum do anything?

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Oh yes!

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Televisions and radios and microwaves and cell phones all work on the electromagnetic spectrum.

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So tell us more about the visible spectrum.

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The visible spectrum consists of all the colors our eyes can see.

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Like orange, red, and yellow.

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And green, blue, and violet.

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That's right.

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Take a look at this color wheel.

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We can mix those colors to make all the colors our eyes can see.

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If we mix all the colors with white, we get white light.

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How can we see the colors in white light?

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We use a spectrometer to pick out the different frequencies.

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Mr. Turner showed us one of those.

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Let me show you something.

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When you mix the three primary colors of pigment,

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you get black because pigment absorbs all the light that hits it.

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That's what pigment is.

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But light is different?

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Yes, it is.

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The primary colors of light are red, green, and blue.

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And when you mix those three, you get white light.

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I hope you learned a lot about the electromagnetic spectrum today.

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The museum has a room full of light and color that tracks your motions.

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I think you might want to check it out.

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Let's go.

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Thanks, Ms. Neal.

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Bye.