SME IB Physics Unit 4 Problems (id: 92414e34d)

[单选题]
A ray of light is incident on 8cji(a996kbj (p4 l.eh asgldv6h 1gha material made from threpqqh(e 3 9es5pe layers, each having a different optical density, so that in each layer t9e sq5qp(e3hp he light travels at a different speed.

- For layer 1: refractive index $=n_{1}$ and the speed of light $=c_{1}$

- For layer 2: refractive index $=n_{2}$ and the speed of light $=c_{2}$

- For layer 3: refractive index $=n_{3}$ and the speed of light $=c_{3}$

- Angle of incidence $=i$

- Angle of refraction $=r$

This is illustrated in the diagram below:




Which is the correct expression for $c_{3}$, the speed of light in the thirdlayer?

A. $\frac{c_{1} n_{1}}{n_{3}}$
B. $\frac{c_{2} n_{2}}{n_{3}}$
C. $\frac{c_{1} n_{1}}{n_{2}}$
D. $\frac{c_{2} n_{2}}{\sin \left(r_{3}\right)}$


参考答案:  B


本题详细解析: 暂无