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AS Physics Flashcards
Topic 8
6
Physics
06/28/2017

Term
 What is superimposing and the requirements needed for it to occur.
Definition
 When two waves meet at a point and the resultant displacement is equal to the vector sum of each individual displacement.  Superimposing requires the two waves to be of similiar waves and if transverse, they must have the same plane of polarisation.
Term
 Define a node and anti node
Definition
 A node is a point of which displacement is always zero. An anti node is a point of which max displacement occurs.
Term
 Define interference and state the two types of interference that occurs.
Definition
 Interference is the affect that occurs when two or more waves meet at a point, overlap and create a new wave pattern. Destructive interference occurs when two or more waves overlap and cancel each other out. This requires them to have similiar frequency and amplitude. constructive interference occurs when two or more waves overlap each other and have an added displacement.
Term
 What is diffraction and what is the affect and the two different outcomes that can be given off.
Definition
 Diffraction is the spreading of waves that occurs when a wave passes through a slit or gap, preventing it from travelling in a straight line. Diffraction occurring with a gap of similiar size to the wavelength will have little affect and only bend a little. Diffraction occurring with a different size gap or smaller, will have a bigger affect on the pattern of the wave.
Term
 Stats Youngs Equation
Definition
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Term
 What is coherency
Definition
 The constant out of phasness of two similiar waves which does not vary with time.
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