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In: Physics

One photon of a certain light has an energy of 3.8e-19J. Calculate the wavelength of the light.


One photon of a certain light has an energy of 3.8e-19J.
Calculate the wavelength of the light.  

  1. 195.511e-9 m

  2. 521.053e-9 m

  3. 594.752e-9 m

  4. 260.699e-9 m

  5. 900.776e-9 m


The refractive index of a certain medium is 1.21.
Calculate the speed of light in the medium.  

  1. 4.411e8 m ⁄ s

  2. 4.693e8 m ⁄ s

  3. 1.955e8 m ⁄ s

  4. 2.479e8 m ⁄ s

  5. 3.985e8 m ⁄ s

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