The main difference between the phenomena of interference and diffraction is that:
1. | diffraction is caused by reflected waves from a source whereas interference is caused due to the refraction of waves from a source. |
2. | diffraction is caused due to the interaction of waves derived from the same source, whereas interference is the bending of light from the same wavefront. |
3. | diffraction is caused due to the interaction of light from the same wavefront, whereas the interference is the interaction of two waves derived from the same source. |
4. | diffraction is caused due to the interaction of light from the same wavefront whereas interference is the interaction of waves from two isolated sources. |
In the given figure \(S_1\) and \(S_2\) are two coherent sources oscillating in phase. The total number of bright fringes and their shape as seen on the large screen will be:
1. | \(3\), rectangular strips |
2. | \(3\), circular |
3. | \(4\), rectangular strips |
4. | \(4\), circular |