Science Study notes #1: Light and Optical Systems (Unit 4)

Vocabulary flashcards covering the systems and properties of light, including sources, reflection, and refraction, based on the Unit 4 study notes.

Incandescence

When an Object is healed to such a high temperature that it emits light

Phosphorescence

Light energy is absorbed by certain particles that can store that energy

Bioluminescence

Chemical reactions inside the body of animals that produce energy for light

Fluorescence

When a substance absorbs light and quickly gives off light, making it glow

Natural Light Sources

Light that comes from nature

Artificial Light Sources

Light that made by humans

Transparent

A material that lets light pass through so you can see clearly through it

Translucent

A material that allows some light to pass through, but objects cannot be seen clearly

Opaque

A material that does not allow light to pass through

Law of Reflection

Light bounces off a surface at the same angle it hits the surface

Angle of Incidence

The angle between the incoming light ray and the normal line

Angle of Reflection

The angle between the reflected ray and the normal line

Reflected Ray

The Light ray that bounces off a surface

Incident Ray

The ray of light that travels from an object towards a reflecting surface

Normal line

An Imaginary line drawn perpendicular ($90^{\circ}$) to a surface at the point where the light hits

Refraction

The bending of light as it travels from one medium to another

Light traveling into a less dense medium

Speeds up and travels away from the normal line

Light traveling into a more dense medium

Slows down and travels towards the normal line