a) If a ray of light travels along the normal, the angle of incidence is 30 o 60

Question

a) If a ray of light travels along the normal, the angle of incidence is

30o

60o    

90o

0o

45o

angle of incidence: 3; angle of reflection: 1

angle of incidence: 1; angle of reflection: 2    

angle of incidence: 3; angle of reflection: 2

angle of incidence: 1; angle of reflection: 3

angle of incidence: 4; angle of reflection: 2

angle of incidence: 2; angle of reflection: 1

angle of incidence: 3; angle of reflection: 4

angle of incidence: 2; angle of reflection: 4

angle of incidence: 4; angle of reflection: 3

angle of incidence: 1; angle of reflection: 4

angle of incidence: 4; angle of reflection: 1

angle of incidence: 2; angle of reflection: 3

Explanation / Answer

eta
a)2

angle of incidense is the angle between normal and incident ray

0o

b)

angle of incidence: 2; angle of reflection: 3

c)

n1*sinthet1 = n2*sintheta2

1*sin31.3 = 1.64*sintheta2

theta 2 = 18.5 degrees

tantheta2 = y/w

y = tantheta2 * w

y = 32*tan18.5

y = 10.71

ii)

costheta2 = w/AB

AB = W/costheta2

speed = v = c/n

time t = AB/v = 0.32*1.64/(cos18.5*3*10^8)

t = 1.845*10^-9 s

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