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 ofthe central bright line b. the distance separating the two slits c. the angle between the central bright line and rst 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 l4. Two monochromatic point sources oflight, S. and 83, are shown below. They are initially in phase. 51 Screen 52. As the phase ol'Si is increasingly delayed with respect to S}, which ol'the Following would be observed? a. The interference pattern will slowly disappear. The distance between adjacent dark bands will increase. The distance between adjacent dark bands will decrease. The pattern of dark bands will slowly begin to shift. The central maximum will become twice as wide. FED-PF? IS. The pendulum ofa grandfather clock in a ship moving at 0.6:: was set to have a period of 1.0 3. What period did it appear to have to an observer on the ground? 31.1.6? 5 d.1.0l) s b. 0.64 s e. 0.80 s c. 1.25 s 16. The equation E = not:3 illustrates that a. energy can be converted into mass b. rest mass and energy are equivalent e. matter can be converted into energy d. both b and c e. both a and c