A light wave has a frequency of What is the wavelength of the light wave?
(Assume the speed of light to be )

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where’s the list ? the question is incomplete

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods