PYRAMID Light Spectrum Prism

Transparent glass pyramid dimensions: 4 cm x 4 cm; height: 4.7 cm

Weight: 30 g.

Light spectrum pyramid (prism)

What we usually call a "light spectrum pyramid" in physics is actually a glass prism. It has the shape of a triangular pyramid and is used to separate light into colors.

When white light (e.g. sunlight) enters a prism:

1️⃣ The light is refracted as it enters the glass

2️⃣ Different waves (colors) are refracted unequally
3️⃣ The light is separated into a spectrum as it exits

This is how we see the color band:

red → orange → yellow → green → blue → indigo → violet

Such prisms are used:
in physics experiments
in spectroscopy (light analysis)
in optics
in science demonstrations in schools
This was first clearly demonstrated by Isaac Newton, who in 1666 performed a famous experiment with prisms.