NAMING/LISTING PARTS
NAME 5 PARTS OF THE EYE?
LENS
RETINA
IRIS
CHOROID
PUPIL
THE________ IS A SPECIAL LINING AT THE BACK OF YOUR EYE
(A) LENS (B) IRIS (C) APERTURE (D) RETINA
(D) RETINA
WHAT IS RECTILINEAR PROPAGATION?
IT IS HOW LIGHT TRAVELS IN A STRAIGHT LINE.
HUMANS CAN ONLY SEE VISIBLE LIGHT( RED, GREEN, YELLOW ETC..) TRUE/FALSE
TRUE — HUMANS CAN ONLY SEE VISIBLE LIGHT, WHICH INCLUDES THE COLORS RED, ORANGE, YELLOW, GREEN, BLUE, INDIGO, AND VIOLET.
WHAT IS A FOCAL POINT??
THE FOCAL POINT IS THE POINT WHERE LIGHT RAYS MEET (OR APPEAR TO MEET) AFTER REFLECTING OFF A MIRROR OR PASSING THROUGH A LENS.
LIST THE TWO TYPES OF VISION PROBLEMS ?
MYOPIA
HYPEROPIA
WHAT PART OF THE EYE IS SIMILAR TO AN APERTURE ?
(A) PUPIL (B) LENS (C) IRIS (D) IRIS
(A) PUPIL
WHY ARE HORSE'S EYES ON THE SIDES OF THIER HEADS?
HORSES HAVE EYES ON THE SIDES OF THEIR HEADS SO THEY CAN SEE ALMOST ALL AROUND THEM AND SPOT PREDATORS QUICKLY. SINCE THEY ARE PREY ANIMALS, WIDE VISION HELPS THEM STAY SAFE IN THE WILD.
INSECTS CAN ONLY SEE ONE FIXED IMAGE? TRUE/FALSE
FALSE — MANY INSECTS HAVE COMPOUND EYES MADE OF MANY SMALL LENSES, SO THEY SEE MANY PARTS OF AN IMAGE AT ONCE AND ARE VERY GOOD AT DETECTING MOVEMENT.
WHAT IS REFRACTION?
REFRACTION IS THE BENDING OF LIGHT WHEN IT MOVES FROM ONE MEDIUM TO ANOTHER (LIKE AIR TO WATER) BECAUSE ITS SPEED CHANGES.
WHAT ARE THE TWO REGIONS OF A SHADOW?
UMBRA
PENUMBRA
_______ IS AN AMOUNT OF LIGHT THAT ARRIVING TO ONE PLACE PER UNIT AREA
(A) ILLUMINANCE (B) LUMINANCE INTENSITY
(C) LIGHT POLLUTION (D) LIGHTS
(A) ILLUMINANCE
WHAT DOES THE IRIS DO?
CONCAVE MIRRORS CURVE INWARDS? TRUE/FALSE
TRUE — CONCAVE MIRRORS CURVE INWARDS, LIKE THE INSIDE OF A SPOON.
WHAT DOES IT MEAN WHEN WE SAY A LENS “FOCUSES LIGHT”?
IT MEANS THE LENS BENDS LIGHT RAYS SO THEY MEET AT A SINGLE POINT CALLED THE FOCUS, FORMING A CLEAR IMAGE.
NAME THE TWO RAY(S) IN THE LAW OF REFLECTION ?
INCIDENT RAY
REFLECTED RAY
1. WHAT PART OF THE EYE CONTROLS HOW MUCH LIGHT ENTERS?
(A) RETINA. (B) IRIS
(C) CORNEA. (D) LENS
(B) IRIS
WHAT HAPPENS WHEN YOU BLINK??
WHEN YOU BLINK, YOUR EYELIDS CLOSE AND OPEN QUICKLY TO KEEP YOUR EYES MOIST AND CLEAN. BLINKING ALSO HELPS PROTECT YOUR EYES FROM DUST AND BRIGHT LIGHT.
THE CENTRE OF CURVATURE IS THE CENTRE OF AN OVAL? TRUE/FALSE
FALSE — THE CENTRE OF CURVATURE IS THE CENTRE OF A SPHERE THAT THE CURVED MIRROR IS PART OF, NOT AN OVAL.
WHAT HAPPENS WHEN LIGHT PASSES FROM AIR INTO WATER?
(A) IT STOPS MOVING
(B) IT BENDS AWAY FROM NORMAL
(C) IT BENDS TOWARDS NORMAL
(D) IT REFLECTS COMPLETELY
(C) IT BENDS TOWARDS NORMAL
NAME THE 3 TYPES OF LEN(ES) ?
PLANE
CONCAVE
CONVEX
2. REFLECTION HAPPENS WHEN LIGHT…
(A) BENDS THROUGH WATER
(B) PASSES THROUGH A LENS
(C) BOUNCES OFF A SURFACE
(D) GETS ABSORBED
(C) BOUNCES OFF A SURFACE
EXPLAIN THE TERM MYOPIA??
MYOPIA, ALSO CALLED NEARSIGHTEDNESS, IS A VISION CONDITION WHERE CLOSE OBJECTS LOOK CLEAR BUT FAR AWAY OBJECTS LOOK BLURRY. IT HAPPENS WHEN LIGHT FOCUSES IN FRONT OF THE RETINA INSTEAD OF DIRECTLY ON IT.
A CONVEX LENS SPREADS LIGHT OUTWARDS. TRUE/FALSE
FALSE: A CONVEX LENS ACTUALLY BENDS LIGHT RAYS INWARD, CAUSING THEM TO CONVERGE AT A FOCAL POINT. IT DOES NOT SPREAD LIGHT OUT—THAT IS WHAT A CONCAVE LENS DOES.
NAME THREE THINGS THAT CAN HAPPEN TO LIGHT WHEN IT HITS A SURFACE.
REFLECTION, REFRACTION, ABSORPTION