Download Phenomenon of Light: Reflection and Refraction and more Lecture notes Physics in PDF only on Docsity!
\
{
“+ Raa e ea to
— - hot tight?
HT ‘it is a Sewree. of illyminckon ___ |] _
|Lwthether or nattural__ane, like Sun oan}
—artifeic one __like (your lamp.
— Colows. of light ave Red, Ovange blue. —
|
| uell ay , Molek — and indigo. 2
Y Oud AIcen v1 ge
[Phenomenon __of Light 7 -
—sReflecten of __light. —
_Refrackion ol light . _
—,Feflection ot Licht a
b What _ is velection J lighnt. e __.
b Light weSleclion occur When a voy —
_ tof ight. bounce oa Suvface and J —-
crane Ihe _divechon . Reflechon of Niget. qL _
_||_ occurs the waves encounlex___o J
_ ||_surface or - tmatny Yak does not__dsotb|| —__-_-
the — energy — &__rediahon and. —_bwnceg the || —-_-
i alaves ——
| ee
4 el —
| — !
Scanned with CamScanner
—— saci a
Who discovered ref lechion of ligrt co
| Some of the —_ecresk.__accouris of |
——— -light__reMlection _ouginale_fiem the ancient |
|| Greek, mathematician Euclid —_vaho candy led] 4
| | a___senes f° experiments around, 400. BC L k
+—— And. appears___ol_series __ of’ _expenment |
|| to nad gpod understanding of _4
| how hat ve relleche| - However ve ff}
tas act unl cat milennivrn and half)
“beter trot Wne Avo — gcientct — Allnazen — |
“|| propased__ et law desenbing exorctly |
| whhek —rappens to ct liqntc ray when 1 3
| kes or gros surloce and then _4
| bounces Pinto Space ff
_ ——hesmring Iqrt__woves__is _ye&ved ag |
| ineident___ weve ord Ie wae a
a bounced) __cvwsoy tran ne sofoce ig ff
© ermed__os___veMeclech wove i
| Liga — incident con the — surface _ol_ medi
_miwtor_—_atc Somme __angle will _be equal |}
to angled reflecton : light of all Ip
_wowes lenght St __1s___also__ termed _as_l|
| Law_oF > _yeflection Lig __does__raol split __
| into ls -comnponent__becnuse __it__is__not__ je
being best: ov _yebacled and all ale
Scanned with CamScanner
to pavliculay___Vallue._ ue ae a
—nerdence Ike cause he. refracted ay |
inthe _vare___mechum —_ lo bend ep \
Wig called critical) angle. a —|
Retraction of Light - ee i
L Sein a \gh when it passes
bo Som ___medivm to andther medium
Linh — “Miser optic _densies..
ly, Medlin in__wthich light travels Slower}
is__optcally denser medium . 7
E Medium... —lallach.. Aight. _hovels_ foster.
E Lis. optically yarey. medium.
Ee To. measure ___ophical densihy we _USe.
E Refackve Index it
i defined as oho of
bo Speed ft light an _vecaum 4p its
f || speed _of__light — nm snechum ee
be ee. denoted::. bye a
—_ | p= Gg
| dee pte spun opin _veleuura_ _keedl_ —_——
ig —spee_—of_ ght of machin
| Befactve. index cf gens 18 1S
Scanned with CamScanner
—Beneng of — ight»
_||_densev [. 1\_
4}-H->-H, '
4
| Light bends tantardl
_gYayey
varey Jo.
UW < Hy
x
Lignt bends _avay
the __ normal, fom normal).
TWo cases where light. 10 bend.
mndlex
rebrack Ve
oll.
ig _denev. # then
when normal
1s
a
Medium ove —clifferent__ At HL.
Hy, = U.
(<0
a | woh ; 7
a Laws __of _ Rehaction- ee 53
eg |The incident oY Nota) and yefacted|_ ||
ee toy lies —io_—the- Same plane att Nee atta
et Woe Poin of incidence |
Scanned with
CamScanner
oe =
of incidence “tp the sine of the |
constant
angke- of __reFracon
Sin ¥
——_——_——- —a
po Sin fe mctant — ———||-
he vaio of’ sine of Ihe. angle. os
foro Qjven__pair_ or media. _
\ —s
a ot es
1
ope Nt _
_ Medium 01 —
_||_ Medium 02 _
| fe | —
Sint — Sinip = Constant yp
Sins, Sint 2
Scanned with CamScanner