Questions:

1) The diagram below illustrates three wavefront moving from left to right. On the diagram, draw in a series of 4 secondary wavelets and the resulting new wave formed after one period:

2) The diagram below illustrates three wavefront moving outward in a circular path from a source. On the diagram, draw in a series of secondary wavelets and the resulting new wave formed after one period:

3) For Newton and Huygens theory on light, draw diagrams to illustrate the differences that would be expected to be observed when a wave front approaches a barrier as shown below: