Ray Optics - What is Refraction of Light ?
Refraction
The phenomenon of bending of light at the interface separating the two media when it travels from are medium to another is called refraction of light.
Refraction through a Glass Slab
For direct light:
At surface PQ,
At surface RS,
For reflected light :
At surface RS,
At surface PQ,
From eq(1) and eq(4)
From eq(2) and eq(3)
Provided :
Refracting surface parallels to each other.
Refraction through a Multiple Media: