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If the wavelength of a certain wave of l...

If the wavelength of a certain wave of light is `2.0 xx 10^3` cm. What is the frequency of this wave?

A

`3 xx 10^10 cm//sec`

B

`1.5 xx 10^7 sec`

C

`5000 A^@`

D

`3 xx 10^4 cm`

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