VISUAL VOCABULARY: LIGHT 8th Grade - AC PHYSICAL SCIENCE
LIGHT CAN BE SEEN AS: RAYS WAVES
WAVE DISTURBANCE IN SPACE-TIME MOVES ENERGY WITHOUT MOVING MATTER
MEDIUM WHAT THE WAVE IS TRAVELING THROUGH SOLID LIQUID GAS
MECHANICAL WAVE WAVE THAT TRAVELS THROUGH A MEDIUM PARTICLES DON’T MOVE – JUST COLLIDE AND PASS THE ENERGY ON (LIKE DOMINOS)
ELECTROMAGNETIC WAVE NO MEDIUM NEEDED! CAUSED BY CHARGES IN ELECTRIC AND MAGNETIC FIELDS
VISIBLE LIGHT ONLY PART OF EM SPECTRUM THAT WE CAN SEE LONGER WAVELENGTH SHORTER WAVELENGTH ONLY PART OF EM SPECTRUM THAT WE CAN SEE DIFFERENT WAVELENGTHS ARE DIFFERENT COLORS
COLORS OF LIGHT PRIMARY COLORS: RED, GREEN, BLUE DIFFERENT FROM MIXING PAINT AND PIGMENTS PRIMARY COLORS: RED, GREEN, BLUE
OPAQUE, TRANSLUCENT, TRANSPARENT PROPERTIES THAT AFFECT HOW LIGHT INTERACTS WITH AN OBJECT TRANSLUCENT OPAQUE TRANSPARENT
TRANSMISSION LIGHT PASSING THROUGH AN OBJECT TRANSPARENT TRANSMITS BEST
ABSORPTION LIGHT IS TAKEN UP BY MATTER OBJECTS ABSORB ALL THE COLORS EXCEPT FOR THE COLOR OF THE OBJECT
SCATTERING OBJECTS REFLECT LIGHT IN ALL DIRECTIONS (AKA DIFFUSE REFLECTION) OBJECTS REFLECT LIGHT IN ALL DIRECTIONS IF LIGHT DIDN’T SCATTER, THEN EVERYTHING WOULD ACT LIKE A MIRROR
REFLECTION LIGHT REFLECTS/BOUNCES BACK FROM AN OBJECT OBJECTS REFLECT THE COLOR LIGHT THAT THEY ARE
REFLECTION VS. SCATTERING EX: RED SHIRT – (IRREGULAR SURFACE) EX: MIRROR (REGULAR SURFACE)
LAW OF REFLECTION
MIRROR OBJECT THAT REFLECTS LIGHT SO WELL THAT OBJECTS LOOK THE SAME
REFRACTION THE BENDING OF A WAVE WHEN IT ENTERS A MEDIUM WHERE ITS SPEED IS DIFFERENT.
LENS DIFFERENT SHAPES TO MAGNIFY OR FOCUS DEVICE THAT TRANSMITS AND REFRACTS LIGHT
IN FOCUS OUT OF FOCUS
TYPES OF LENSES CONVEX LENS LIGHT RAYS CONVERGE CONCAVE LENS LIGHT RAYS DIVERGE
HUMAN EYE THE LENS DIRECTS AND FOCUSES LIGHT COMING INTO THE EYE
NEARSIGHTEDNESS FIX WITH A CONCAVE LENS *EYE TOO LONG *IMAGE FOCUSED BEFORE RETINA FIX WITH A CONCAVE LENS
FARSIGHTEDNESS FIX WITH A CONVEX LENS EYE TOO SHORT IMAGE FOCUSED BEHIND RETINA FIX WITH A CONVEX LENS