- Paranch
Forine
ITE
ERI=
ELL-
IRI-
RI=452
F4=
ILI -
XL1=400
Aashl=
llcl-
o
ILLE
Xc2=602
VADSL2
してこ
2=
Esa
IT-
Vestito
22
2- 11.036-2
2
VA=6120
PE=

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.