1.2 particals and waves 2 ( interference and difraction gratings) Flashcards
1
Q
name the 4 properties that define a wave ?
which is unique to a wave and does not work for particles ?
A
- interference
- reflection
- refraction
- defraction
interference
2
Q
when does constructive interference occur ?
A
when 2 waves are in phase.
3
Q
when dose destructive interference occur ?
A
when waves are out of phase.
4
Q
what happens when waves are in phase ?
A
they meet crest to crest and trough to trough.
5
Q
what is the one true test for a wave ?
A
interference.
6
Q
what do waves that are coherent have in common?
A
same speed,wavelength,frequency and are in phase.
7
Q
what is path difference ?
A
the difference in distance (or path) travelled by two coherent wave sources.
