Summary

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Abstract

Interesting facts on Sunlight

Sunlight and Reflector

Pigments as Reflectors

Plant Pigments

Spectrophotometer

Bibliography and Acknowledgement

Based on the experiments conducted, I learned that:

Visible or white light is a mixture of rainbow colors.

Red Orange Yellow Green Blue Indigo Violet

When visible light meets an object, the object has a capacity to absorb, reflect and/or transmit the different colors of the light.

The color(s) of the object we see is the color(s) of the light reflected and/or transmitted by the object. Such an object would be called a 'Reflector'.

Based on the information gathered on plant pigments, I learned that:

We find natural reflectors such as
1. pigments found in plants, vegetables and fruits, making them look colorful.
2. pigments found in animal skins, giving us colorful animal skins with variety of shades.
3. water vapor in the atmosphere, giving us spectacular rainbow, when sunlight passes through it.

Plant pigment "Chlorophyll" makes plant leaves look green.

Plant pigment "Carotenoid" makes fruits and vegetables look orange, yellow, red.

Plant pigment "Phycobilin" makes plants look bluish green or red. They are also used in Cancer research as they show property of fluorescence.

We can use spectrophotometer to determine the fading away of colors in an art exhibit. A spectrophotometer is an instrument used to determine the colors of light a pigment absorbs and transmits.

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