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
2007-03-27 08:28:54 · 1 個解答 · 發問者 2003 2 in 科學 ➔ 其他：科學
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
2007-03-27 09:55:13 · answer #1 · answered by Karin 6 · 0⤊ 0⤋