The document discusses interference of electromagnetic waves. It explains that the intensity of two waves added together can be calculated using an equation that takes into account the individual intensities, wavelength, and phase difference between the waves. It then provides an example problem where the individual intensities, wavelength, and distance between two waves are given, and calculates the total intensity when the waves are combined using the interference equation.

1. Interference
Lawrence Ma
21063145

2. • Interference- core of physical optics
• We will be looking mostly at electromagnetic waves
• Addition of two waves having same frequency can have it’s
intensity calculated from the equation
I(T)=I(1)+I(2)+2sqrt(I(1)I(2))cos(phase difference)

3. Question
- From two points on a graph, the distance between the two
points are 3m apart. The wave length of both graphs are 6m.
- The intensity of laser 1 is 500nm
- The intensity of laser 2 is 600nm
- What is the intensity of the combination of the two lasers?

4. Phase difference formula=2pi(delta(distance)/wavelength)
=2pi(3/6)
I(1)=5x10^-7m
I(2)=6x10^-7m
I(T) =((5x10^-7)+(6x10^-7)+2sqrt((5x10^-7)(6x10^-7))cos(2pi(0.5)

5. • = 4.55x10^-9m=total intensity