A prism is a cut piece of clear glass or plastic in the form of a triangular prism that separates white light into a spectrum through ?

Refraction

Explanation:

The speed of light depends on the medium in which it travels. For example, light travels slower in water than in air because water is denser.

This is related to prisms because light, when entering a prism will travel slower, so it will change direction, this is known as refraction and is the reason why prisms produce rainbows (spectrum).

White light is made up of different wavelengths, as each of these wavelengths passes through the prism it separates the light because each one will travel at a different speed and this difference in speed causes each wavelength to be refracted in a slightly different direction, causing white light to break down into the colors of the visible spectrum.

Haha i like this question :)

speed is just one thing: the rate of movement on it's own.However, a velocity is a little more technical.

A velocity has two parts to it:
1. the rate of movement (the same as speed, above)
as well as;
2. the direction of motion.

SO you can imagine that as the tortoise goes around it keeps facing different directions so although for both speed and velocity the rate of movement is the same, the direction of motion is changing for the velocity.

This means that for circular motion, speed is constant but velocity is changing.

Now, any time you have a changing velocity (because of a change in its rate of motion or direction, or both) we say that there is acceleration.

So we say that although the tortoise has a constant speed, it is constantly accelerating due to it's circular motion.