En Joy
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No they are in same page of a book !Jilang said:Are you taking these expressions from two different texts? They may be using different units.
Sorry guys, in the first expression this should be ν in the sub script instead of λ.En Joy said:
Thank youJilang said:Ah. Then you are not comparing apples with apples! One is the density per unit wavelength and one is per unit frequency. They would not be expected to have the same units. They are different things.