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[匿名]

2011-11-22 12:47 am

This question is about reflection of water waves

In a ripple tank , a straight water wave of wavelength 1 cm travels in a deep region . It then enters a shallow region and its speed is reduced to one fifth of the original. What is the wavelength of the wave in the shallow region?

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回答 (2)

天同

2011-11-22 1:01 am

✔ 最佳答案

When water ripples go from a deep region to a shallow region, its frequency remains unchanged.

Since speed of wave = frequency x wavelength
hence for a fixed frequency of waves, speed of wave is proportional to its wavelength.

Therefore, wavelength at shallow region = 1 x (1/5) cm = 1/5 cm = 0.2 cm

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數學人

2011-11-24 5:22 am

v1/v2 = 入1/入2
1/5 = 入1/1
入1 = 0.2 cm

參考: own knowledge

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