Notes

*UPDATED* For 2022-23 Boards Exam


SHOBHIT NIRWAN's
DESIGNED




LIGHT
NOTES

, Reflection
law of Reflection
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Plane mirror
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Spherical Mirror
ray diagrams concave mirror
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-
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Image formation by convex mirror
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Uses of concave 4 Convex mirror
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Mirror formula



Light

Refraction
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causes of Refraction
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Refraction through Rectangular glass slab
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laws of Refraction
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Refractive Index
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spherical lens
lens
Kay diagrams convex

I
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Image formation by concave lens
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lens formula
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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 .