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ReflectionReflection
PLAN MIRROR 1
PLAN MIRROR 2
PLAN MIRROR PLAN MIRROR
•Defining Defining
• Its parts Its parts
•Shaping of imageShaping of image
•ExerciseExercise
PLAN MIRROR PLAN MIRROR
Is transparency object Is transparency object which get to reflect of which get to reflect of light and has plane light and has plane surface.surface.
darkshine
Plan mirror
Image
object image
THE IMAGE CHARACTERISTIC OF
PLANE MIRROR • Virtual• Standing• The distance of object = The
distance of image• Symmetries • The image place
CONCAVE MIRROR The lesson aim Defining Its parts Special rays Shaping of image Exercise
• The concave mirror is the inside of the spherical surface is the reflecting surface.
• The characteristic of concave mirror to collect of rays or CONVERGEN
• The cut point of focusing reflected rays mentioned FOCUS LENGTH
DEFINING OF CONCAVE MIRROR
The parts of concave mirror
FC V
C = center of mirror curve or radius of
curvature
F =the mirror focal point or focal length
V = the mirror vertex
FV = the distance of mirror focal length
CV= the mirror radius
The principle rays The principle rays of concave mirrorof concave mirrorThe principle rays The principle rays of concave mirrorof concave mirror1.1.A ray parallel to the mirror A ray parallel to the mirror
axis is reflected passes axis is reflected passes through the focal point of a through the focal point of a
concave mirror concave mirror
2.2.A ray that passes through the A ray that passes through the focal point of concave mirror is focal point of concave mirror is reflected parallel to the mirror reflected parallel to the mirror
axis .axis .
3. A ray that proceeds along a 3. A ray that proceeds along a radius of the mirror is reflected radius of the mirror is reflected
back along its original path.back along its original path.
FV
1. A ray parallel to the mirror axis reflected passes through the focal point of a concave mirror
FV
2. A ray that passes through the focal point of concave mirror is reflected parallel to the mirror axis
FV
3. A ray that proceeds along a radius of the mirror is reflected back along its original path
Images formed for the following
object distance:•Inside F ( first room)•Between C and the focal
length ( second room)•Beyond the center of
curvature C (third room)•At Focal (F)•At the radius of curvature
(C).
TERUSULANG
FC
Images formed at C
The nature real, inverted, the same size at the radius of curvature C
FC
Images formed at inside F ( first room)
The nature virtual, erect, enlarger at IV room
FV
Images formed between C and the focal length F( second room)
The nature real, inverted, enlarger at III room
FC
Images formed beyond the center of curvature (third room)
The nature real, inverted, diminished at II room
FC
Images formed at F
No image will be formed ( the image distance is infinite)
.
LANJUT