you are walking around a large open field. the only objects nearby are two identical speakers some distance apart. the speakers emit sound in phase with wavelength 4 m. at certain locations in the field, the sound is very loud. at others, it is very quiet. you conclude at each of these locations that you are experiencing the effects of interference. for each of the locations given, indicate the type of interference that occurs there. i. 20 m from each speaker ii. 20 m from the first and 12 m from the second iii. 10 m from the first and 12 m from the second iv. 21 m from the first and 15 m from the second
