Lesson 2
Section A
1. Refraction is the bending of a light wave as it enters a new medium. It is caused by the change in speed that occurs when it enters the new medium
2. Rules review
a. SFA: if a light wave passes from a medium in which it travels slowi nto a medium in which it travels fast, then the light wave would refract away from the normal
b. FST: if a light wave passes from a medium in which it travels fast into a medium in which it travels slow, then the light wave will refract towards the normal
3. Symbols
a. Oi- angle of incidence
b. Or- angle of refraction
4. The higher the optical density, the higher the refraction
Section B
1. The more the light refracts, the larger the angle will be
2. Snell's Law: ni *sine(Ɵi) = nr * sine (Ɵr)
3. Meaning of previous law
a. Ni = index of refraction of the first medium
b. Nr= index of refraction of the second medium
c. Ɵi= angle of incidence
d. Ɵr= angle of refraction
Section C:
How to solve a problem
1. List all of the known information
2. Plug this information into Snell's Law equation
a. ni *sine(Ɵi) = nr * sine (Ɵr)
3. Solve algebraically
Section D:
1. More problem solving, see textbook
1. Refraction is the bending of a light wave as it enters a new medium. It is caused by the change in speed that occurs when it enters the new medium
2. Rules review
a. SFA: if a light wave passes from a medium in which it travels slowi nto a medium in which it travels fast, then the light wave would refract away from the normal
b. FST: if a light wave passes from a medium in which it travels fast into a medium in which it travels slow, then the light wave will refract towards the normal
3. Symbols
a. Oi- angle of incidence
b. Or- angle of refraction
4. The higher the optical density, the higher the refraction
Section B
1. The more the light refracts, the larger the angle will be
2. Snell's Law: ni *sine(Ɵi) = nr * sine (Ɵr)
3. Meaning of previous law
a. Ni = index of refraction of the first medium
b. Nr= index of refraction of the second medium
c. Ɵi= angle of incidence
d. Ɵr= angle of refraction
Section C:
How to solve a problem
1. List all of the known information
2. Plug this information into Snell's Law equation
a. ni *sine(Ɵi) = nr * sine (Ɵr)
3. Solve algebraically
Section D:
1. More problem solving, see textbook