1.

An equilateral deviates a ray through 45^(@) for the two angle of incidence differing by 20^(@). The angle of incidence is

Answer»

`60^(@)`
`40^(@)`
`120^(@)`
NONE of these

Solution :(a) Since, PRISM is equilaterial
`:.` Angle of prism `=60^(@)`
ALSO, `i-i'=20`
`:' delta=i+i'-A` or `delta+A=i+i'`
or `40^(@)+60^(@)=i+i'` or `i+i'=100`
Adding eqs (i) and (II) we get
`2i=120`
`i=60^(@)`


Discussion

No Comment Found

Related InterviewSolutions