Question

i)state two laws of refraction of light. ii) write the lens formula in terms of power​

Answer 1

i) The two laws of refraction are:-

• The incident Ray , the refractive Ray And the normal to the separating surface at the point of incidence all lie in the same plane.

• The ratio of sin eik angle of incidence to the angle of refraction is a constant.

sin i/ sin r = constant

Power = 1 / focal length

Answer 2

The incident Ray , the refractive Ray And the normal to the separating surface at the point of incidence all lie in the same plane