CONCAVE MIRROR SUBJECT-SCIENCE CLASS-X CONCAVE MIRROR SUBJECT-SCIENCE CLASS-X CONCAVE MIRROR SUBJECT-SCIENCE CLASS-X PREPARED BY- PREPARED BY- SRADHANJALI PRADHAN SRADHANJALI PRADHAN CLASS - B.ED PART-II CLASS - B.ED PART-II ROLL NO.- 20(SCIENCE) ROLL NO.- 20(SCIENCE) PREPARED BY- SRADHANJALI PRADHAN CLASS - B.ED PART-II ROLL NO.- 20(SCIENCE)

CONTENTS CONCAVE MIRROR PARTS OF CONCAVE MIRROR RULES FOR OBTAINING IMAGE FORMED BY CONCAVE MIRROR DIFFERENT TYPES OF IMAGES FORMED BY A CONCAVE MIRROR USES OF CONCAVE MIRRORS

CONCAVE MIRROR AA concave mirror is that spherical mirror in which the reflection of light takes place at the concave surface

PARTS OF CONCAVE MIRROR  Centre of curvature (C)  Radius of curvature (R)  Pole (P)  Principal Axis  Principal Focus (F) P _____R___ <>

RULES FOR OBTAINING IMAGES FORMED BY A CONCAVE MIRROR RULE -1 A ray of light which is parallel to the principal axis of a concave mirror, passes trough its focus after reflection from the mirror A ray of light which is parallel to the principal axis of a concave mirror, passes trough its focus after reflection from the mirror

RULE-2 A ray of light passing trough the centre of curvature of a concave mirror is reflected back along the same path A ray of light passing trough the centre of curvature of a concave mirror is reflected back along the same path

RULE-3 A ray of light passing trough the focus of a concave mirror becomes parallel to the principal axis after reflection A ray of light passing trough the focus of a concave mirror becomes parallel to the principal axis after reflection

FORMATION OF DIFFERENT TYPES OF IMAGES BY A CONCAVE MIRROR Positions of the object :  between the pole (P) and focus (F)  At the focus (F)  between focus (F) and centre of curvature (C)  At the centre of curvature (C)  beyond the centre of curvature (C)  At infinity

WHEN THE OBJECT IS PLACE BETWEEN POLEAND FOCUS OF THE MIRROR (OBJECT BETWEEN P AND F) NATURE OF IMAGE  behind the mirror  Virtual and errect  larger than the object

WHEN THE OBJECT IS PLACED AT FOCUS OF A CONCAVE MIRROR (OBJECT AT F) NATURE OF IMAGE aaaat infinity rrrreal and inverted hhhhighly magnified or enlarged

WHEN THE OBJECT IS PLACED BETWEEN FOCUS AND CENTRE OF CURVATURE (OBJECT BETWEEN F AND C) NATURE OF IMAGE  beyond the centre of curvature  real and inverted  larger than the object

WHEN THE OBJECT IS PLACED AT THE CENTRE OF CURVATURE OF ACONCAVE MIRROR (OBJECT AT C) NATURE OF IMAGE  at the centre of curvature  real and inverted  same size as the object

WHEN THE OBJECT IS BEYOND THE CENTRE OF CURVATURE OF A CONCAVE MIRROR (OBJECT BEYOND C) NATURE OF IMAGE  between the focus and centre of curvature  real and inverted  smaller than the object

WHEN THE OBJECT IS AT INFINITY NATURE OF IMAGE aaaat the focus rrrreal and inverted mmmmuch smaller than the object (or highly diminished)

USES OF CONCAVE MIRRORS Concave mirrors are used - AAAAs reflectors in car head- lights,search lights,hand torches,and table lamps. BBBBy doctors to concentrate light on body parts like ears and eyes. IIIIn the field of solar energy to focus sun- rays on the objects to be heated. AAAAs shaving mirrors.

SUMMARISATION So far we had discussed- Concave mirrors Concave mirrors Parts of concave mirrors Parts of concave mirrors Different types of images formed by a concave mirror Different types of images formed by a concave mirror Uses of concave mirror Uses of concave mirror

EVALUATE YOURSELF Q1)A ray of light which is parallel to the principal axis of a concave mirror,after reflection a) passes through its focus b) is reflected back along the same path c) becomes parallel to the principal axis d) passes through the centre of curvature

Q2) When the object is placed at centre of curvature,then image is formed a) behind the mirror b) between focus and centre of curvature c) beyond centre of curvature d) at centre of curvature

Q3) When the object is placed at the focus of a concave mirror, then image is formed a) behind the mirror b) at infinity c) at the focus d) beyond centre of curvature

 TRY AGAIN

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