Light
Electromagnetic radiation we can see
Reflection
The bouncing of light off a surface
Transparent
A material that allows almost all light to pass through it and form a clear image is ______________
Translucent
A material that allows most light to pass through it and form a blurry image is ______________
Opaque
A material that light does not pass through is ________
Transmission
The passage of light through an object
Absorbtion
The transfer of energy from a wave to the material it travels through
Law of reflection
When a wave is reflected from a surface, the angle of reflection is equal to the angle of incidence
Regular reflection
Reflection of light from a smooth shiny surface
Diffuse reflection
Reflection of light from a rough surface
Concave mirror
A mirror that curves inward
Focal Point
the point at which light rays parallel to the optical axis converge after being reflected
Focal length
The distance along the optical axis from the mirror to the focal point
Convex mirror
A mirror that is curved outward like the back of a spoon
Refraction
The change in direction of a wave as it's speed changes while it passes from one material to another.
Lens
A transparent object with at least one curved side that can cause light to change direction
Convex lens
A lens that is thicker in the middle than at the edges
Concave lens
A lens that is thicker at the edges than in the middle
Rod
One of many cells in the retina of the eye that respond to low light
Cone
One of the many cells in the retina of the eye that respond to color
Optical Device
An instrument or object used to produce or control light.
Refracting Telescope
A telescope that uses lenses to gather and focus light from distant objects
Reflecting Telescope
A telescope that uses a mirror to gather and focus light from distant objects
Microscope
An optical device that forms magnified images of small, close up objects.
Laser
A device that generates a beam of coherent light
Hologram
A three-dimensional photograph of an object