Hi could you please answer 12 to 16 thank you

Part A - Knowledge and Understanding Multiple Choice Questions [16 marks] Use a pencil to circle the most appropriate answer for each question. 12. In a two-point source interference pattern in a ripple tank, a point is one wavelength farther from one source than the other. If the two sources are in phase, then there is a. constructive interference at this point b. destructive interference at this point C. both constructive and destructive interference simultaneously d. neither constructive nor destructive interference at this point e. no interaction between the two waves at this point 13. Tom wishes to perform Young's double-slit experiment to measure the wavelength of light of a given source. He has measured the average distance between adjacent dark bands and the distance from the slits to the screen. What other measurement does he require to calculate the wavelength? a. the location of the central bright line b. the distance separating the two slits the angle between the central bright line and first nodal line d. the distance between the source and the slits e. the distance between the centre of the two slits and any given dark band 14. Two monochromatic point sources of light, Si and S2, are shown below. They are initially in phase. $1 . Screen $2 As the phase of S1 is increasingly delayed with respect to $2, which of the following would be observed? a. The interference pattern will slowly disappear. b. The distance between adjacent dark bands will increase. c. The distance between adjacent dark bands will decrease. d. The pattern of dark bands will slowly begin to shift. e. The central maximum will become twice as wide. 15. In Newtonian mechanics, the speed of light a. is 3 x 108 m/s d. can be infinite b. will be faster than c e. none of the above . will be slower than c 16. The equation E = mc illustrates that a. energy can be converted into mass b. rest mass and energy are equivalent c. matter can be converted into energy d. both b and c e. both a and c