What is the Difference Between Incandescence and Iridescence?

Incandescence and iridescence are two different phenomena related to light production and color perception. Here are the key differences between the two:

• Incandescence: This occurs when light is produced from a heated solid material. The light is in the visible electromagnetic radiation range, making it perceptible to the human eye as a color. Incandescence is a special type of thermal radiation, and it happens when the temperature of a material increases to the point where it emits light.
• Iridescence: This is the production of luminous colors that seem to change when seen from different angles. Iridescence is often known as "luminescent" and is generally used in decorative lighting. It produces a colorful reflection of light that appears to change color as the light source shifts.

In general, incandescent light is created by a heated filament in a lightbulb, while iridescent light is produced by a combination of reflection and refraction of light from a light source, such as the sun or other lighted objects. Iridescent light usually shifts colors depending on the angle of the light, as light reflects off the surface differently depending on how it strikes.

Comparative Table: Incandescence vs Iridescence

The main difference between incandescence and iridescence is the source of the light produced. Here is a comparison table highlighting their differences:

Incandescence is the process of producing light from a heated solid material, typically used in lightbulbs, while iridescence is the production of luminous colors often resembling a rainbow, caused by multiple, differential refractions, and is commonly observed in decorative lighting and natural objects like butterfly wings.