LIGHT AND ITS USES

LIGHT RAY STRAIGHT LINE PATH OF LIGHT

RAY MODEL OF LIGHT THE RAY MODEL OF LIGHT ASSUMES LIGHT RAYS SPREAD OUT IN ALL DIRECTIONS IN STRAIGHT-LINE PATHS CALLED LIGHT RAYS. AN IMAGE IS FORMED WHEN THE LIGHT RAYS LEAVING THE OBJECT FROM THE SAME POINT MEET.

SHADOWS SHADOWS OCCUR BECAUSE LIGHT TRAVELS IN STRAIGHT LINES IF AN OBJECT GETS INTO THAT BEAM, THE OBJECT BLOCKS SOME OF THE LIGHT & A SHADOW IS CREATED.

REFLECTION OF LIGHT

WHEN LIGHT STRIKES A SURFACE, SOME OF THE LIGHT BOUNCES BACK (IS REFLECTED). THE REST IS EITHER ABSORBED BY THE MATERIAL OR TRANSMITTED THROUGH IT. REFLECTION OF LIGHT

LAW OF REFLECTION LIGHT WILL BE REFLECTED OFF A SURFACE AT THE SAME ANGLE AS IT STRIKES THE SURFACE.

THE TYPE OF SURFACE THE LIGHT STRIKES DETERMINES THE KIND OF REFLECTION SURFACE TEXTURE

SMOOTH SURFACE = RAYS HIT AT THE SAME ANGLE, THUS ARE REFLECTED AT THE SAME ANGLE. THIS IS CALLED REGULAR REFLECTION

WHEN THE SURFACE IS NOT SMOOTH, OR IRREGULAR, EACH LIGHT RAY HITS THE SURFACE AT A DIFFERENT ANGLE. THIS IS CALLED DIFFUSE REFLECTION

IT STILL OBEYS THE LAW OF REFLECTION, SO EACH RAY IS REFLECTED AT A DIFFERENT ANGLE FROM THE OTHERS. THE REFLECTED RAYS ARE SCATTERED IN ALL DIRECTIONS

DIFFUSE REFLECTION

MIRRORS

PLANE MIRROR MIRROR WITH A VERY, VERY, VERY, VERY, VERY FLAT SURFACE EX: WALL OR POCKET MIRROR

CHARACTERISTICS OF PLANE MIRRORS THE IMAGE IS RIGHT SIDE UP THE IMAGE IS THE SAME SIZE AS THE ORGINAL OBJECT LEFT & RIGHT ARE REVERSED THE IMAGE APPEARS TO BE ON THE OTHER SIDE OF THE MIRROR = VIRTUAL IMAGE (NOT REAL)

VIRTUAL IMAGE THE LIGHT RAYS REFLECTED DON’T ACTUALLY MEET, BUT THE IMAGE SEEMS TO BE LOCATED WHERE THE LIGHT RAYS WOULD MEET MEANS NOT REAL; THE IMAGE CAN ONLY BE SEEN IN THE MIRROR

CONCAVE MIRRORS SURFACE CURVES INWARD LIGHT RAYS COMING IN PARALLEL ALL REFLECT THROUGH THE SAME POINT IN FRONT OF THE MIRROR MAY BE A VIRTUAL OR REAL IMAGE & MAY BE INVERTED OR UPRIGHT DEPENDING ON THE LOCATION OF THE OBJECT IN RESPECT TO THE FOCAL POINT EX: MAKE-UP MIRRORS

FOCAL POINT THE POINT IN FRONT OF THE MIRROR WHERE THE REFLECTED RAYS MEET

PLANE MIRROR

CONCAVE MIRROR WITH AN OBJECT REFLECTED FROM A DISTANCE

CONCAVE MIRROR RAYS, FOCAL POINT, AND CENTER

CONCAVE MIRROR WITH THE OBJECT REFLECTED LOCATED INSIDE THE FOCAL POINT

OBJECT “VIRTUAL” IMAGE CONCAVE MIRROR OBJECT BETWEEN FOCAL POINT & MIRROR

CONVEX MIRROR SURFACE CURVES OUTWARD REFLECTED RAYS SPREAD OUT FROM THE SURFACE IMAGE RIGHT SIDE UP AND SMALLER THAN THE ORIGINAL OBJECT VIRTUAL IMAGE USED IN CARS & STORE SECURITY