# What happens when you shine a CD with a flashlight?

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## What are the colors formed between the CD and flashlight?

White light (like light from the flashlight) is made up of 7 colors (red, orange, yellow, green, blue, indigo, violet). The CD separates the white light into the 7 colors that make it up, where they then reflect onto the wall. A CD is made of aluminum (and covered with a clear coat of plastic.)

## Why are CDS reflective?

As we saw in the question on rainbows, white light is made up of all different colors of light. Or, they may reflect exactly out of phase, and red will be eliminated. On a CD, the surface is mirrored so the rainbow colors are much more intense.

## Is flashlight reflection or refraction?

The answer is that any time light rays travel through only one medium, in this case air, it is reflection. Light rays travel from the light source, through the air, hit the opaque spoon, and reflect back to our eyes to produce the image we see.

## Why does a CD diffract light?

Although a CD is not really a diffraction grating, after all the light bounces off of the CD, it does not pass through it, the CD acts like a diffraction grating because the reflected light undergoes constructive and destructive interference due to the special geometry of the CD’s bottom surface.

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## Is a CD a prism?

The CD acts like a prism because the narrow grooves are so close to each other that you cannot see the separation. But, white light will be separated by the grooves. Another name for this CD phenomenon is diffraction.

## What do you see on holding a CD in the sun?

When you hold a CD under the sunlight it reflects a rainbow due to it’s reflecting nature. The reflecting colors that can be seen from a CD are interference colors, for example the shifting colors that we see on a soap bubble. It can be thought of as light being made up of waves, like the waves in the ocean.

## Can we touch a rainbow?

In short, you can touch someone else’s rainbow, but not your own. A rainbow is light reflecting and refracting off water particles in the air, such as rain or mist. … However, it is possible to touch the water particles and refracted light (if you agree that you can touch light) of a rainbow that someone else is viewing.

## How do you make a homemade prism?

Making a water prism is easy. Just fill up your glass dish with water, place the mirror in at an angle, and find a sunny spot to reflect the sunlight through the water. Voila! A water prism!