my college hive icon mycollegehive
Groups
My College Hive notifiction icon Questions
Connect / Friends
Tags
Quiz
Books
A ray of light travelling from glass into ethyl alcohol is i...
physics ssce-exam-2020 waec-physics-2020 waec-2020
up
0
down

A ray of light travelling from glass into ethyl alcohol is incident at the boundary at an angle of incidence 30o. Calculate the angle of refraction. [Refractive index of glass = 1.5; refractive index of ethyl alcohol = 1.36]

A. 27.0o

B. 33.5o

C. 51.7o

D. 72.8o

538 views
Share Follow
peter
Asked by peterrep:1.6K
University of Lagos Nigeria
28 August 2020

Comments





2 answer(s)


james_mark
James_mark answeredrep:694
School not set Nigeria
30 August 2020
up
0
down

from snell's law,

sinθ1/sinθ2 = n2/n1 -------------- eqn(1)

where,

n1=incident index of ethyl = 1.36

n2=refracted index of glass = 1.5

θ1 = incident angle of ethyl = 30

θ2 = refracted angle of glass

from eqn(1), 

n1sinθ1 = n2sinθ2

sinθ2 = n1sinθ1 / n2

sinθ2 = 1.36sin(30) / 1.5

sinθ2 = 0.45333

θ2 = sin-1(0.45333)

θ= 27

Answer: A

 

Share
Comments




Johncalc1980
Johncalc1980 answeredrep:12
Nigeria
30 August 2020
up
0
down

Answer is A using snell's law

Share
Comments




Groups


Your Answer

How to insert math formulas/equations

my college hive loader icon



Related Tags

physics

6 followers

121 questions

ssce-exam-2020

10 followers

273 questions

waec-physics-2020

7 followers

48 questions

waec-2020

12 followers

273 questions