Light and optical (short version)

reflection

reflection

when light rays reflect from a reflective surface

law of reflection

reflection ray is equal to incidence ray

Concave mirrors

• Reflected rays converge

• Upside down

• Smaller view of object

Convex mirrors

• Rays diverge

• Wider view of object

Refraction

• Redirection of light as it moves through different mediums

• Speed of light changes as it goes through different materials

• light bends when moves through objects that have different density

• bends towards normal in denser object

• Bends away from normal then leaves denser object

transmission

light moving through electromagnetic wave through a material

absorption

electrons absorbing energy of light wave, changing their energy state

index of refraction

measuring bending when light ray goes from one medium to another

Normal line

• Imaginary line perpendicular to mirror at point of reflection

• Scientists measure light ray angles surfaces

Reflected Ray

Ray of light after being reflected

Incident Ray

Ray of light before hitting reflective surface

Angle of incidence

Angle measured between normal line and incident Ray

Angle of reflection

Angle measured between normal line and reflected ray

Point of reflection

Point of which light Ray reflected

Angle of incidence equal

To the angle of reflection

opaque

• Can’t see through

• no light passes through

• absorbs and partially reflects back

translucent

• partially see through

• some light passes through

• only transmits, reflects

transparent

• fully see through

• all light passes through

• absorbs, transmits, reflects light