From the diagram below, the correct equation for the refractive index n of the medium...
PHYSICS
WAEC 2010
From the diagram below, the correct equation for the refractive index n of the medium is
- A. n = tan i
- B. n = \(\frac{sin i}{sin 90^o}\)
- C. n = \(\frac{sin i}{cos (90^o - i)}\)
- D. n = sin 90oC
Correct Answer: A. n = tan i
Explanation
refractive index(n) = \(\frac{sin i}{sinr}\)
where r = 180-(90+i) → r=90-i
since sin(90-i)=cos i
: refractive index(n) = \(\frac{sin i}{cos i}\)
→ tan i
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *