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

Question

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

An equilateral prism deviates a ray through `45^(@)` for the two angles of incidence differing by `20^(@)`. The angle of incidence is
A. `62.5^(@)`
B. `42.5^(@)`
C. Both are correct
D. Both are wrong

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
(c ) We have, `delta=i_(1)_i_(2)-A`
`45^(@)=(i_(1)+i_(2))-60^(@)`
`i_(1)+i_(2)=105^(@)`
and `i_(1)-i_(2)=20^(@)`
On solving Eqs. (i) and (ii), we get
`i_(1)=62.5^(@)andi_(2)=42.5^(@)`

5 views Answered 2023-02-05 15:29