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A laser radiates blue light with a wavelength of 470 nm.

Calculate the frequency of this blue light.

Calculate the frequency of this blue light.

λ=fc

On 6 august 2012, the mars rover Curiosity landed on the planet. The signal from Curiosity only reached Earth after 13 minutes and 48 seconds.

Calculate the distance between Mars and the Eart at that moment. Give the answer in millions of kilometers.

Calculate the distance between Mars and the Eart at that moment. Give the answer in millions of kilometers.