Eleven wave crests are observed on a screen placed below a ripple tank,the total distance between the first and the last wave crest is 33cm. When an object of length 10 cm is placed in ripple tank,it casts a shadow of length 02cm on the sceen .What is the wavelength of water waves?
A.1.50cm
B.1.65cm
C.3.00cm
D.3.30cm
E.6.60cm
wave...
2007-03-27 8:28 pm
回答 (1)
2007-03-27 9:55 pm
✔ 最佳答案
Eleven wave crests are observed on a screen placed below a ripple tank,the total distance between the first and the last wave crest is 33cm. When an object of length 10 cm is placed in ripple tank,it casts a shadow of length 02cm on the sceen .What is the wavelength of water waves?Wavelength
= 3.3cm /(11-1) x 1.0cm/0.2cm
= 1.65cm
Therefore the answer is B 1.65cm
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