Term
| state the principle of superposition |
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Definition
When two waves meet at a point, their resultant displacement is the vector
sum of the individual displacements. |
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Term
| State the conditions necessary for a stationary wave to form |
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Definition
Requires two progressive wave of the same frequency travelling in opposite
directions along the same line. (If transverse they must also have the same
plane of polarisation.) |
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Term
State the formula used to calculate wavelength when two slit interference of light
is observed. State the meaning of each term in the formula. |
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Definition
λ =
xa/D
λ = wavelength of light
x = distance between adjacent fringes
a = slit separation
D = distance between slits and screen. |
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Term
| State the conditions necessary for a stationary wave to form. |
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Definition
Requires two progressive wave of the same frequency travelling in opposite
directions along the same line. (If transverse they must also have the same
plane of polarisation.) |
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Term
| State what is meant by the term “coherence |
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Definition
The phase relationship between two waves remains constant and does not
vary with time. |
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