demonstrate wave effects using a ripple tank Flashcards
Ripple tanks demonstrate which properties?
Reflection, Refraction, Diffraction
Apparatus of a ripple tank?
Light source, Support, Wooden Bar, Elastic Bands, Water, Screen (where wave front lines are generated)
How is reflection shown?
When a wave hits a plane.
Formula of reflection?
I = R
How do you start to show refraction?
Place glass block in tank.
Where should the glass block sit?
Below the water surface.
What happens when the glass block is placed?
Depth of water becomes shallower.
What happens when the depth decreases?
Speed decreases, wave fronts come closer together.
How do you start to show diffraction?
Place a small barier/obstacle in tank.
What happens when the wave encounters two obstacles with a gap?
The waves spread out.
What does amount of diffraction depend on?
Size of gap compared to wavelength.
How does frequency of vibrating motor increasing affect wavelength?
Wavelength should decrease.
