According to the law of reflection, if the angle of incidence is 45 degrees, what is the angle of reflection?
135 degrees
180 degrees
90 degrees
45 degrees

Option D

45 degrees

Explanation:

The law of reflection states that the angle of incidence equals to the angle of reflection hence when the angle of incidence equals to 45 degrees, we expect that the angle of reflection should also be 45 degrees.

there are no correct statementd on the list of choices you provided.

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.