If the distance between a crest and the adjoining trough is 20 cm. Then the wave - length will be

If the distance between a crest and the adjoining trough is 20 cm. The

1.	If the distance between a crest and the adjoining trough is 20 cm. Then the wave - length will be
A.	30 cm
B.	20 cm
C.	40 cm
D.	25 cm
Answer» B. 20 cm

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If the distance between a crest and the adjoining trough is 20 cm. Then the wave - length will be

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