Light

Question 1

Refraction

Answer 1

Refraction is the bending of light when it travels from one medium to another

Question 2

Refractive index formula

Answer 2

Sin i over sin R speed of light in vacuum over speed of light in
medium

Question 3

Explain what is meant by the critical angle for a ray of light

Answer 3

Angle of incidence resulting in an angle of refraction of 90 degrees, beyond this angle the ray is totally internally reflected. Ray travelling from optically dense medium to less dense medium