LIGHT.

Light is a form of energy which is emitted by a

luminous body and when incident on the eye

causes the sensation of light.

CHARACTERISTICS OF LIGHT RAYS

Light is a form of energy which always travels with maximum velocity.

Light travels in straight.

When light rays fall on smooth reflecting surfaces, angle of incidence is equal to angle of reflection .

Light undergoes the phenomenon of reflection, refraction, total internal reflection, interference, dispersion, diffraction and polarization.

Light undergoes the phenomenon of scattering,discovered by C.V.Raman.

CONCAVE MIRROR

If the convex surface of a

spherical mirror is silvered

then the concave surface acts

as a reflecting surface and it is

called concave mirror.

1.WHEN THE OBJECT IS AT INFINITY.

pFC

Real, inverted and point sized image is formed at ‘ F ‘.

NATURE OF IMAGES FORMED BY CONCAVE MIRROR

2.Object placed beyond ‘c’

PFCA

B

A1

B1

Real, inverted and small sized image is

formed in between F and C.

3.Object placed at ‘c’

B

PFC

G

O

Real, inverted and same sized image is formed at ‘C’.

4.Object placed between ‘F’ and ‘C’

PFCI

G

O

J

Real, inverted and big sized image is formed beyond ‘ C ‘

5.Object placed at ‘F’

F PC

J

O

Real, inverted and large sized image is formed at infinity.

6.Object placed in

between ‘P’ and ‘F’

C F PO

J

I

G

Virtual, erect and magnified image is formed behind the mirror.

USES OF CONCAVE MIRROR

Concave mirror is used as a reflector in head lights of vehicles.

Dentists & ENT specialists use concave mirrors to see small inner parts of throat , nose etc.

It is used as shaving mirror. Concave mirrors are used in telescopes

BIBLOGRAPHY

MODERN ABC OF PHYSICS BY SATISH K GUPTA

COMPREHENSIVE PHYSICS BY LAXMI PUBLICATIONS

PREPARED BY:- K.G.MALLIKARJUNVICE PRINCIPAL

JNV, ANANTHAPUR