1. Quiz_03 2-slits interference, Phasor, thin film interference

2. Find the wavelength of light used in this 2- slits interference.
Q1.1
Find the wavelength of light used in this 2- slits interference.
Note: Not drawn to scale.
3.16mm
0.666mm mm
0.200mm C

3. Q1.2 A

4. What do these pictures try to illustrate?
Q1.3
What do these pictures try to illustrate?
The phase shift during reflection.
Interference can occur when the film thickness is less than the coherent length of the light.
Interference can occur when the film thickness is greater than the coherent length of the light. B

5. Q1.4
Refer to the picture on the right, which reflection produces a 180o phase shift?
The first reflection.
The second reflection
Both
Neither B