light rays Flashcards
What are mechanical waves
they are waves that are produced by a disturbance, for ex in a medium they are transmitted by to and fro vibrations
What are progressive waves
is a disturbance that carries energy from one place to another without transferring matter
what are the 2 types of waves
transverse and longitudinal
difference between transverse waves and longitudinal
transverse the disturbance is perpendicular to the wave propaganda while longitudinal its along the wave
one wavelength
crest-crest /trough-trough
speed formula for waves
v=F*lamda
wavelenght=
lamda=v/f
frequency=
f=v/lamda
What is phase
they have the same speed and direction
what is ray
the direction of travel
law of reflection
i=r
where do the waves move fast and slow
deep water is fast, shallow water is slow
what is diffraction
the bending of waves
what steps should be taken to expand the waves a lot
small gap similar to the size of the wave
what are regular and diffuse reflections
regular reflections occur on smooth surfaces while diffuse reflections occur on not smooth bumpy surfaces thus they are scattered
