Statistics for AQA - A Level Physics - Waves #2

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Hint	Answer	% Correct
What is the angle of refraction at the critical angle	90 degrees	0%
Define node	A point where the waves are in antiphase and destructively interefere	0%
Define antinode	A point where the waves are in phase and constructively interfere	0%
What occurs where an antinode is produced	Constructive interference	0%
What does the loudness of a sound depend on?	Depends on the amplitude of a sound wave	0%
What does the pitch produced by a string depend on?	Depends on the frequency of the 1st harmonic	0%
What occurs where a node is produced	Destructive interference	0%
What is L in f = (1/2L)×√(T/µ)	Length of the string (m)	0%
Give 3 factors that determine the 1st harmonic on a string	Length, tension and mass per unit length	0%
Definition of the refractive index of a material	n = c/v Speed of light in a vacuum/Speed of light in material	0%
What is the phase difference between points either side of a node?	Pi radians	0%
What is T in f = (1/2L)×√(T/µ)	Tension in the string (N)	0%
Why can only certain frequency standing waves be produced on strings?	The must be nodes at the fixed ends and only certain frequencies/wavelengths allow this.	0%
What are the conditions required for total internal reflection	The second medium has a lower refractive than the first. The angle of incidence is greater than the critical angle.	0%
Phase difference of all points between two adjacent nodes	Zero	0%