1. REFLECTION: (bounces off)
*light hits an object that it can’t enter and
so bounces off.
Regular reflection- same angles due to smooth surface.
Angle of incidence- incoming rays and imaginary line perpendicular to surface.
of reflection- reflected ray from light wave and imaginary
Diffused reflection- rays scatter due to uneven or bumpy surface.
*we see most objects because of scattering.
OF LIGHT: (passes thru)
* Light usually travels in a straight line unless medium changes/bends it. In rays away from source.
*passing of light through matter (things that take
some light thru ie: wax paper
change in speed & direction.
-when passing from one material to another it will change speed and angle.
-travels more slowly through certain medium (atoms-like diffusion)
travels faster in air than water
*light bends when changes from one medium to another.
-changes direction when interacts
depends on wavelenghts (shorter-more bend).
-bend of light due to change of speed.
-light refracts once hits lens in eye; to
only see when light waves bounce off object, reflected or scattered,
and into eyes.
not needed for light to move, part of EM Wave.
light absorbed by the material/medium that takes in the light holds
transfer of energy by light waves to particles in matter.
dark material and pavement.
black t-shirt in summer- hot due to holding light energy.
*light weakens as further
from source- more matter absorbs it.
-objects closer to the light are brighter than distant objects.
-air particles absorb
some light so gets dim the further away.
of light energy by matter that absorbed extra energy.
decides what happens.
scatters in all directions once released.
ie: can see outside of beam from flashlight.
ie: sunlight throughout air.
is blue because blue is shorter wavelength and scattered