7/21/2019 TUGAS TAMBAHAN Indeks bias lensa dan zat cair

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ADDITIONAL TASK

INDEKS BIAS LENSA DAN ZAT CAIR (O2)

1. Magnifying glassA magnifying glass is simply a !n"#$ l#ns m#an% %! '#l p %!

an !&*#% %! s## i% magni+#. I% is a "#,y simpl# f!,m !f mi,!s!p#- an

i%s in"#n%i!n all!# many la%#, &,#a/%',!g's in !p%is %! !,. T'#

magnifying glass is m!s% n!%a&ly s##n in mys%#,y +%i!n- an is i!nially

ass!ia%# i%' %'# +%i!nal 'a,a%#, S'#,l!/ 0!lm#s- '! s# !n# %!

s%y %'# s#n# !f a ,im# in !,#, %! l!a%# l#s.A magnifying glass is a !n"#$ l#ns. C!n"#$ m#ans ,"# !%a,-

li/# %'# n#,si# !f a sp!!n !, %'# !m# !f a sp!,%s s%aim. I% is %'#

!pp!si%# !f !na"#- !, ,"# ina,. A l#ns is s!m#%'ing %'a% all!s

lig'% ,ays %! pass %',!g' i% an ns- !, ,#f,a%s- %'#m as %'#y ! s!. A

magnifying glass s#s a !n"#$ l#ns as# %'#s# l#ns#s as# lig'% ,ays%! !n"#,g#- !, !m# %!g#%'#,.

A magnifying glass- in ##%- %,i/s y!, #y#s in%! s##ing 'a% isn%

%'#,#. Lig'% ,ays f,!m %'# !&*#% #n%#, %'# glass in pa,all#l &% a,#

,#f,a%# &y %'# l#ns s! %'a% %'#y !n"#,g# as %'#y #$i%- an ,#a%# a

3"i,%al imag#3 !n %'# ,#%ina !f y!, #y#. T'is imag# app#a,s %! la,g#,

%'an %'# !&*#% i%s#lf as# !f simpl# g#!m#%,y4 5!, #y#s %,a# %'# lig'%

,ays &a/ in s%,aig'% lin#s %! %'# "i,%al imag#- 'i' is fa,%'#, f,!m y!,

#y#s %'an %'# !&*#% is an %'s app#a,s &igg#,.

2. R#f,a%ing T#l#s!p#3'y an my #y# n!% s## %'ings %'a% a,# ,#ally fa, aay63 7#ll- %'#

simpl# ans#, is y!, #y# ann!% &,ing in #n!g' lig'%8 if # !l &,ing

in m!,# lig'%- # !l s## %'ings m' fa,%'#, aay. S! '! an # &,ing

in m!,# lig'%6 T'# simpl#s% s!l%i!n is %! *s% 'a"# a &igg#, #y#. A

,#f,a%ing %#l#s!p# s#s a ,#ally &ig l#ns %! &,ing in a l!% !f lig'% an n

i% %!a, a small#, l#ns %'a% is a&!% %'# si9# !f y!, #y# s! %'a% i% f!,ms

an imag#.

7/21/2019 TUGAS TAMBAHAN Indeks bias lensa dan zat cair

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All ,#f,a%ing %#l#s!p#s s# %'# sam# p,inipl#s. T'# !m&ina%i!n

!f an !&*#%i"# l#ns (1) an s!m# %yp# !f #y#pi## (2) is s# %! ga%'#,

m!,# lig'% %'an %'# 'man #y# is a&l# %! !ll#% !n i%s !n- f!s i% (:)-

an p,#s#n% %'# "i##, i%' a &,ig'%#,- l#a,#,- an magni+# "i,%al

imag# (;).T'# !&*#%i"# in a ,#f,a%ing %#l#s!p# ,#f,a%s !, ns lig'%. T'is

,#f,a%i!n as#s pa,all#l lig'% ,ays %! !n"#,g# a% a f!al p!in%8 'il#

%'!s# n!% pa,all#l !n"#,g# p!n a f!al plan#. T'# %#l#s!p# !n"#,%s a

&nl# !f pa,all#l ,ays %! ma/# an angl# < is all# %'# angla,

magni+a%i!n. I% #?als %'# ,a%i! %##n %'# ,#%inal imag# si9#s !&%ain#

i%' an i%'!% %'# %#l#s!p#.R#f,a%ing %#l#s!p#s an !m# in many i#,#n% !n+g,a%i!ns %!

!,,#% f!, imag# !,i#n%a%i!n an %yp#s !f a,,a%i!n. B#as# %'# imag#

as f!,m# &y %'# ning !f lig'%- !, ,#f,a%i!n- %'#s# %#l#s!p#s a,#

all# ,#f,a%ing %#l#s!p#s !, ,#f,a%!,s.