2.1 (i)
Contents
Demonstration 1
Firstly it is worth discussing the historical basis to Young's Double Slits experiment. Set up the Young's double slit experiment with a monochromatic LASER.
Resources
Analysis
It is worth discussing the observations and recording the observations in terms of positions of maxima and the dimensions of the set up, as well as the intensity variation. You may wish to do the complete analysis of the experiment here, using the equation to find a value of λ and checking it is in the correct part of the visible spectrum.
Equipment
Safety
Demonstration 2
Having recently seen diffraction with the microwave kit, they should be able to predict what will happen with two slits. Set up the microwave apparatus so that you (they) can plot out points of maxima and minima along an arc.
Resources
Analysis
With the maxima and minima plotted out, they can then calculate path difference. It can also be explained using the Young's slits sliding waves (black background). They can then compare this to a calculated value of λ from information taken from the set up. This can all be compared to a value for λ from the microwave kit; usually 2.8 cm.
Equipment
Demonstration 3
They have already seen the two source interference pattern in [[2.1
