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Spy Pen with Invisible Ink

By Janice VanCleave

teachersource.com

The spy pen contains ink that is invisible, which means that under ordinary lighting the ink does not reflect visible light to your eyes. Visible light is one of seven different types of light energy (also called electromagnetic energy) and is the only type of light that you can see. Visible light is a band […]

Filed Under: Light Tagged With: fluorescence

Perception of Color

By Janice VanCleave

Iridescence Clouds

Vision depends on a small part of the Electromagnetic Spectrum Called Visible Light. The only type of light energy that you can visually perceive is called visual light. Visual light can be broken into seven parts, each part with a different amount of energy, and each amount of energy is perceived as a different color. […]

Filed Under: Light, Physics Tagged With: electromagnetic spectrum, visible light

Luminescence

By Janice VanCleave

Luminescence Is Cold Light Cold light is visible light produced by processes other than heating. Light sticks are an example of cold light, which is produced when chemicals are mixed together and the energy released is in the form of visible light. The firefly in the photo gives off light that like the light stick […]

Filed Under: Light, Physics Tagged With: bioluminescence, cold light, luminescence

Energy: Electric, Light, Sound

By Janice VanCleave

Safe Tool for Teaching Electric current.

Preview in new tab A “Mystery Ball” is used to demonstrates three types of energy: electric energy light energy sound energy Objectives: 1. To describe the physical properties of the energy ball.2. To identify the the types of energy produced by the Energy Ball: electric energy, light energy, and sound energy.3. To describe the difference […]

Filed Under: electricity, Energy, Light, Sound

What Are Chromophores?

By Janice VanCleave

Leaves are green because they contain chlorophyll, a pigment whose molecules absorb all the light energy in the visible light spectrum except the parts producing the green color of the leaf, which is reflected.  Chromophore is the name of the chlorophyll functional group (aka moiety) of the chlorophyll molecule.Organic pigments (chemicals that have color) have […]

Filed Under: Chemistry, Light

ROY G. Biv

By Janice VanCleave

Color Spectrum

The rainbow colors are so spectacular. Notice that the rainbow colors are always in the same order. R is for red light, which is light with the least energy.O is for orange light.Y is for yellow light.G. is for green light.B is for blue light.I is for indigo light.V is for violet light, which is […]

Filed Under: Light, Physics

Flame Colors:Photons

By Janice VanCleave

When you see colors, it is because some form of visible light has entered your eye and was absorbed by special light sensitive cells inside your eyes.

Filed Under: Light, Physics Tagged With: colored flames, electromagnetic radiation, photons, visible light

Light

By Janice VanCleave

ANSWER: The color of an object is not in the object but rather depends on the light that pigments in the object reflect or transmit. Pigments are chemicals that subtract (absorb) specific colors of light and reflect or transmit other colors. White light contains all the colors of a rainbow. Starting from the top of the […]

Filed Under: Light Tagged With: complimentary light colors, primary light colors

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Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

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