whcih of the following about interference is / are correct?
(1)at points of destructive interference, the resultant amplitude is always zero
(2)destructive interference occurs ar points where the path difference is integral multiples of the wavelength of the sources which are in antiphase
(3)energy is created at points of constructive interference
A(1)only
B (2)only
C(1)and (3)only
D(2) and (3)only
detailed explanatio
f.5 phy_wave
2009-01-29 7:12 am
回答 (1)
2009-01-29 11:30 am
✔ 最佳答案
(1) is wrong. the resultant amplitude of destructive interference can be less than either wave, alone, and can even be zero(2) is true. In fact, at all points the two waves exactly cancel each other out
(3) is wrong. energy is created at points of sources.
B (2)only
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