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