refractive index of glass

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Table :
Angle of
incident, i.
Angle of
, refraction,r
20
25
30
35
40
27~
:? g
-
/
J
✓/
45
50
/
0 .,_? If
0 , CJ
9
23
3 I?
sinr
sini
2-
~= sini/sinr
0 p l/(
Qo
({ ?
o- ?G
u ~-
,c,
o-S
o ., 5"1
,r;
0 ?) j
J)J
0
_? 5 )
O ? 7-:J
32?
-
) . 2 '?
D ~ ] 'Of
D~S7
J ~ ') 7-
o · ? 1 0 n~ 5
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I? 4~
The College of ; ~
Haringey, Enfield
and North East London
Lahora t ory Risk Asscss 1nent
, ;: 1_1, , 11cl! m us t be co mp lctc.:d befo re co mmencin g cncli expe rim ent.
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Group :
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Date :
dmp'/4 ~~c;:f4,n1
l . H A ZARD A. ., ·D RJSJ< C OD ES . Pleas e enter below the correct Hazard Code and Risk Cod e
for cali·i rcager,l, soi \' ent, prod uct and by- product . (Le tter and numb er in the relevant boxes)
- - ~ ---
RE-AG-E\T A\"D
J'.''STR cv1c,·rs
r
HAZARD (H) AND RJSKS(R) CODES
Others (Insert)
-
A
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I
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r/
I
,H /R /H
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'-Pfffi .,I
Ir
H
R
H
R
H
R
H
R
0 0
0 0
a 0
,.J,
10 ',Y
E = DANGER TO
ENVIRONMENT
W = VIOLENT REACTION
WITH
WATER/A CIDS/BASES
R,i = RADIOACTIVE
A • CO JUWS I VE
11:i • H ARMF UL
T • TOX IC
1-' a f LA /\l/\1ABLE
X .. J, XPLOS JV E
I
= INSTRUMENT HAZARD
0
= OXIDISING
AGENT
0 = NO HAZARD/RISK
= LOW HAZARD/R ISK
2 = MODERATE
HAZARD/RISK
3 = HIGH HAZARD/RISK
1
PREC AU TIONS : CONTAINMENT AND PROTECTION
.ST A CE OF EXPERJ.\-1Ei\'T CONTAINMENT
() 's' C Ll'D I:\G DI SPOSAL ) I
CODE
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C(J '- T A 1r--: ., 1 r:~ T
CODE
P Ln SO ,"\'AL J> H OTE C Tf ON
l
Op en Lab 2 = Reslricted Lnb (no naked names)
J = Fume Cupbonrd
=
rnsi.: rt nl I rcq u ircmcnl s ncldi li onn l to coa t nnd glasses . (e.g. gloves)
/\DDITJO SA L I;\ 'J•OHMA 'I IO N
e.g. di sp0s1d/s pi.:cifii.:d wnslc co nl ain er, sink and water etc .
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