Chapter 20, Problem 20.17P

(a)

Interpretation Introduction

Interpretation:

The angle of ${\text{θ}}_{\text{2}}$ has to be calculated.

Concept introduction:

Snell’s law:

When light is passed into one medium to another medium, the angle of incidence is equal to angle of reflection when, the light is reflected.

${\text{n}}_{\text{1}}\text{sin}{\text{θ}}_{\text{1}}\text{=}{\text{n}}_{\text{2}}\text{sin}{\text{θ}}_{\text{2}}$

${\text{n}}_{\text{1}}\text{and}{\text{n}}_{\text{2}}$ are the refractive indexes of the two media

${\text{θ}}_{\text{1}}\text{and}{\text{θ}}_{\text{2}}$

(b)

Interpretation Introduction

Interpretation:

The angle of ${\text{θ}}_{\text{2}}$ has to be calculated.

Concept introduction:

Snell’s law:

When light is passed into one medium to another medium, the angle of incidence is equal to angle of reflection when, the light is reflected.

${\text{n}}_{\text{1}}\text{sin}{\text{θ}}_{\text{1}}\text{=}{\text{n}}_{\text{2}}\text{sin}{\text{θ}}_{\text{2}}$

${\text{n}}_{\text{1}}\text{and}{\text{n}}_{\text{2}}$ are the refractive indexes of the two media

${\text{θ}}_{\text{1}}\text{and}{\text{θ}}_{\text{2}}$