LIGHT REFLECTION AND REFRACTION NOTES

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⑨ Light travels in a straight line.

⑥

REFLECTION

coming back of light rays to the same medium , when they fall on

a surface.

# LAWS of Reflection:

* Angle of incidence kit-AngkofreH.fr).

is Incidentrayg normal at the point of incidence

and reflected ray all lie inthe same plane .

K3B㱺oAny ray of light which is incident normally ..

on a mirror is reflected back along its }㱺 n

own path.

;

Normal

° Object -

Point of intersection of incident ray.is called object.

°

Image -

Point of intersection of reflected ray

is called image .

Real Image virtual Image

It the light rays coming from a Height rays coming from a point,

paint actually , meet after reflection,

after reflection does not meet actually

then image formed is real .

but appear to meet at anotherpoint

then image formed Ps virtual .

Trick :

-

def light vo Real ,

set Aet E virtual .

r s

i go.pt?.af.noghtEd"

real ± > I

-

-

-i. ! ' -

-

-

object i ' -

-

Image z s s -

780

← -

(Intersection of '

line.tn?sedecnttfnoayts, e

I reflected rays) y

'

Red-

Reflected rays Black > Incident rays

Plane mirror

°

Object and image are equidistant from the plane mirror ° If object is real then image will be virtual and vice-versa.

°

Image is laterally inverted i. e. left seems to be right and

vice-versa

° Size of image is equal to size of object .

° Uses →

looking glass , periscopes etc .