The Class 10th CBSE LIGHT Notes provide a comprehensive overview of the chapter "Light – Reflection and Refraction," which is part of the Science syllabus prescribed by the Central Board of Secondary Education (CBSE) for Class 10. These notes are designed to help students understand and revise th...
Refraction through Rectangular glass slab
-
laws of Refraction
-
Refractive Index
-
spherical lens
lens
Kay diagrams convex
I
-
-
Image formation by concave lens
-
lens formula
-
Power of lens
, travels in ⑥
⑨
Light a
straight line .
REFLECTION
coming back
a surface .
of light rays to the same medium , when they fall on
# LAWS of Reflection :
)
*
Angle of incidence kit-AngkofreH.frincidence .
is Incidentrayg normal at the point of
and reflected ray all lie in the same plane .
K3B oAny ray of light
which is incident
normally
}
..
on a mirror is reflected back along its n
own
path .
;
Normal
°
Object -
Point of intersection of incident ray .is called object .
intersection of reflected ray
°
Image Point of is called
image
-
.
Real virtual
Image Image
It the light rays coming from a Height rays coming from a point ,
after reflection does not meet actually
paint actually , meet after reflection to meet at another
but point
,
appear
then
image formed is real .
then
image formed Ps virtual .
Trick :
-
def light vo Real
,
set Aet E virtual .
" s
go.pt?.af.noghtEd
r
i real ±
> I -
-
-
i. !
'
-
-
-
780
object i
←
'
-
-
-
Image
(Intersection of
z s
s
'
-
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 .
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