1.

A wavefront AB moving in air is incident on a plane glass surface XY as given in figure.Its position CD after refraction through the glass slab is shown along with normals A to D. The refractive index of glass w.r.t. Air will be equal to :

Answer»

`(BD)/(AC)`
`(AB)/(CD)`
`(BD)/(AD)`
`(AC)/(AD)`

Solution :`mu = (SIN i)/(sin R)` , here i = `theta` and r = `PHI`
`therefore mu= (sin theta)/(sin phi)`


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