Flashcards
Waves 2
Cards in this deck (18)
- 1What is superposition?When two waves of the same type meet and pass through eachother. Superposition is where the waves overlap, producing a single wave.
- 2What is the principle of superposition?When two waves meet at a point the resultant displacement at that pont is equal to the sum of the displacements of the individual waves.
- 3Define interferenceWhen two progressive waves continuously pass through each other and superpose, producing a resultant wave with a displacement equal to the sum of the individual displacements from the two waves.
- 4Define constructive interferenceWhen the two waves that overlap are in phase, resulting in the maximum resultant displacements increasing, increasing amplitude.
- 5How would an increase in amplitude resulting from constructive interference change the intensity of the resultant wave?Intensity ∝ amplitude² , so intensity will also increase
- 6Define destructive interferenceWhen two progressive waves are in anti-phase, the maximum resultant displacements decrease, causing amplitude to decrease.
- 7Define coherenceWhen waves have a constant phase difference.
- 8What is an interference pattern?A series of maxima and minima created when two coherent waves emitted from two sources overlap.
- 9What is the path difference at an area of constructive interference?0 or nλ, where n is an integer
- 10What is the path difference at an area where there is destructive interference?(n + 1/2)λ, where n is an integer
- 11Describe the young double-slit experimentTwo coherent waves are used to form an interference pattern, which is done by passing monochromatic in phase light through a double slit to. The two coherent waves produced diffract, overlapping and forming an interference pattern. This is seen on a screen as fringes.
- 12What is the equation used to find the wavelength of the light used in the double slit experiment?λ(wavelength) = a(separation between slits) x(distance between adjacent fringes) / D(distance from slits to screen)
- 13How is a stationary wave formed?When two waves with the same frequency travelling in opposite directions are superposed, creating a series of nodes and antinodes.
- 14What is the seperation between two adjacent antinodes in a stationary wave?1/2λ
- 15Is energy transferred across a stationary wave?No - there is no net energy transfer
- 16Describe the phase differences along a stationary waveAll parts of the wave between a pair of nodes are in phase, and at the nodes they are in antiphase
- 17Where does the maximum amplitude occur on a stationary wave?At the antinode
- 18Define the fundamental frequency of a stationary waveIt is the minimum frequency of a stationary wave
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- AS - Level Physics Flashcards on Waves 2, created by Kayla Price on 30/03/2016.
- Created by
- Kayla Price · Mar 2016
- Updated
- May 18, 2016
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