Which statement is true if the refractive index of medium a is greater than that of medium b?
total internal reflection is possible when light travels from air to medium b to medium a.
total internal reflection is possible when light travels from medium a to medium b.
total internal reflection is possible when light travels from medium b to medium a.
total internal reflection is possible when light travels from air to medium a.
total internal reflection is possible when light travels from air to medium b.
nextreset

answer:

total internal reflection is possible when light travels from medium a to medium b.

explanation:

as we know by the law of refraction

here if total internal reflection occurs then it means the light will refract at an angle 90 degree

so here we will have

now we know that value of sine is always less than 1

so here we will have

so here

so here light must be travel from medium a to medium b as refractive index of a is more than medium b

scientific laws are the result of testing theories and proving them to be facts.

conservation of mass

mass before something happens = mass afterwards