What could be a correct expression for the speed of ocean waves in terms of its wavelength $\lambda $ , the depth $h$ of the ocean, the density $\rho $ of sea water, and the acceleration of free fall $g$ ?
A$\sqrt {g\lambda } $
B$\sqrt {g/h} $
C$\sqrt {\rho gh} $
D$\sqrt {g/\rho } $
Medium
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A$\sqrt {g\lambda } $
a A question of units and dimensions. Only the dimension of option $(A) \sqrt {g\lambda } $ matches the dimesion of speed.
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