sample data reflection & refraction

8/17/2019 Sample Data Reflection & Refraction

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Reflection and Refraction EX-9987 Page 1 of 11

Lab Report: Reflection and Refraction

Name: Sample Data and Answers

DATA PROCEDURE A:

Bouncing Light off a Flat Mirror

FLAT MIRROR

Angle of Incidence

iθ

Angle of Reflection

r θ

24° 23°

45° 45°63° 63°

Written by Cecilia A. Hernández !1!


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Reflection and Refraction EX-9987 Page of 11

DATA PROCEDURE B:

Bouncing Light off a Concave Mirror

CONCAVE MIRROR

Angle of Incidence

iθ

Angle of Reflection

r θ

18° 18.5°45° 45°64° 66°



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Reflection and Refraction EX-9987 Page " of 11

DATA PROCEDURE C:

Bouncing Light off a Convex Mirror

CONVEX MIRROR

Angle of Incidence

iθ

Angle of Reflection

r θ

33° 32°45° 44°62° 60°



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Reflection and Refraction EX-9987 Page # of 11

DATA PROCEDURE D:

The Bending of Light ! Refraction

REFRACTION: Calculated Index of Refaction!=ac"licn 1.33

INTERFACE # $ Fo% ai into ac"lic INTERFACE & $ Fo% ac"lic into ai

Incident angle

'in ai(

Refacted angle

'in ac"lic(

Incident angle

'in ac"lic(

Refacted angle

'in ai(

21° 14° 16° 21°

45° 32° 32° 41°

63° 40° 41° 63°



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Reflection and Refraction EX-9987 Page $ of 11

PROCEDURE D:

REFRACT"O# ) Plot of ai *in θ

ver$u$ ac"lic*in θ

fo% +ata,tudio! -it. t.e Linea Fit/



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Reflection and Refraction EX-9987 Page % of 11

DATA PROCEDURE E: O$erving Di$%er$ion



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+I,0ER,ION

At t.e +i*1e*ion Inteface

'Lig.t ta2eling fo% ac"lic into ai/( Index of Refaction of Ac"lic

Incident angle

ac"licθ

Refacted angle

'in ai(

RE+ lig.t

edθ

3LE lig.t

5lueθ

Fo RE+ lig.t Fo 3LE lig.t

20° 26.3° 27.9° 1.30 1.37



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&UE'T"O#' PROCEDURE' A( B( C: Bouncing Light off Mirror$

)* Accoding to t.e La- of Reflection! t.e incident angle and t.e eflection angle %u*t e t.e

*a%e/ +i*cu**: 6o- -ell doe* "ou ex1ei%ent *.o- t.i*7 +oe* it %atte -.et.e t.eeflecti2e *uface i* flat o cu2ed7 8."7

The results were very good, all angles where either the sae or

o! "y #ust one or hal$ a degree. %t does not atter i$ the sur$a&e is

&urved. The law o$ re'e&tion sees to "e valid $or all sur$a&es.

This is "e&ause no atter the sur$a&e, the light stri(es at a single

)oint and re'e&tion ha))ens $or all sur$a&es out o$ a )oint.

+* 8.at ae *ouce* of ex1ei%ental uncetaint" fo t.i* 1at of t.e ex1ei%ent7

The "ea o$ light has a &ertain thi&(ness and it is hard to de&ide

whi&h side o$ the "ea to tra&e. %t is also hard to always shine the

light e*a&tly at the sae )oint on the irrors.

&UE'T"O#' PROCEDURE D: The Bending of Light ! Refraction

Note& '(e )*eed of lig(t in a +ac,, i) %9*#::/;<

× .

)* Calculate t.e *1eed at -.ic. lig.t ta2el* in*ide ac"lic/

+or a &al&ulated inde* o$ re$ra&tion o$ 1.33,

+ c/n -3.0 * 108 s/1.33 2.26 * 108 s

+* Loo= at Inteface #: 8.en ta2eling fo% ai into ac"lic! did t.e efacted a" ent to-ad o

a-a" fo% t.e no%al line7 %t "ent toward the noral inside the a&ryli&.



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,* Loo= at Inteface &: 8.en ta2eling fo% ac"lic into ai! did t.e efacted a" ent to-ad o

a-a" fo% t.e no%al line7 %t "ent away $ro the noral when it

entered the air.



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Reflection and Refraction EX-9987 Page 1! of 11

&UE'T"O#' PROCEDURE E: O$erving Di$%er$ion

Note: Red lig(t i) t(e lo0 fre,ency2 long 0a+elengt( end of t(e +i)ible )*ectr,. 3l,e lig(t2 in

co*ari)on2 (a) (ig(er fre,ency and )(orter 0a+elengt(.

)* Calculate t.e *1eed at -.ic. ed lig.t ta2el* t.oug. ac"lic/


+red c/n -3.0 * 108 s/1.30 2.31 * 108 s

+* Calculate t.e *1eed at -.ic. lue lig.t ta2el* t.oug. ac"lic/


+red c/n -3.0 * 108 s/1.37 2.19 * 108 s

,* 8.ic. ent %oe to-ad t.e no%al! ed lig.t o lue lig.t7 The red light "ent

ore toward the noral.

-* Fo -.ic. colo lig.t i* t.e index of efaction .ig.e! fo ed lig.t o fo lue lig.t7 The

"lue light had the higher inde* o$ re$ra&tion.

.* Co%1ae t.e indexe* of efaction of ed and lue lig.t to t.e index of efaction of ac"lic

calculated in 0ocedue +! -.ee di*1e*ion -a* not con*ideed/

+or red, 1.30.

+or "lue, 1.37.



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+or white light the value deterined was 1.33, whi&h is

soewhere in the iddle "etween the values $or red and $or "lue.

/* Conclu*ion*:

T.e .ig.e t.e fe>uenc" of t.e lig.t! t.e slower t.e *1eed t.oug. t.e %ediu%/

T.e .ig.e t.e fe>uenc" of t.e lig.t! t.e higher t.e index of efaction of t.e

%ediu%/

T.e fa*te t.e ea% of lig.t t.oug. a %ediu%! t.e lower t.e index of efaction/

T.e fa*te t.e ea% of lig.t t.oug. a %ediu%! t.e ore it deflect* to-ad t.e

no%al u1on efaction/


sample data reflection & refraction

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