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 and 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 |
In a double-slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. Monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double-slit within the central maxima of a single-slit pattern?
1. 0.2 mm
2. 0.1 mm
3. 0.5 mm
4. 0.02 mm