Physics chapter 14 Flashcards
How does a ripple tank work?
It works by having a wave generating probe produce a continues wave in the water. The ripple tank has a glass bottom that allows light to be projected down through the water and the glass onto a screen below the table.
What is a ripple tank?
A shallow glass of tank of water, used to demonstrate the basic properties of waves.
Define wave speed?
The rate at which the crest of a wave travels along.
Speed of light in meters?
300,000,000 m/s through air
Sun energy reaches us in what form?
In the form of radiation, light waves and infrared vision
What is the formula for frequency?
Velocity / Wavelength
Name the relation ship between Frequency and speed
They are directly proportional
Name the relationship between Frequency and Wavelength
They are inversely proportional
Define the relationship between the speed and wavelength of a wave?
They are directly proportional
Define wavefronts?
A line joining adjacent points on a wave that are all in step with eachother
When is diffraction greatest?
When the width of gap is equal to the wavelength of the waves being diffracted.
How can speed of ripple in a ripple tank be changed?
By changing the depth of the water.
How does the depth of the water affect the speed of the ripple?
Shallower water gives slower ripple speed while deep water gives faster ripple speed.
Define diffraction?
As ripple pass through a gap in the barrier, they spread out into the space beyond the barrier.
Why is it that very small gaps are required to see light being diffracted?
Because the wavelength of light is very short at less than a millionth of a metre.
