The speed of a light wave in a certain transparent material is 0.681 times it\'s

Question

The speed of a light wave in a certain transparent material is 0.681 times it's speed in vacuum, which is 3.00 x 10^8 m/s. When yellow light with a frequency of 5.21 x 10^14 Hz passes through this material, what is its wavelength in nanometers? ______________ nm The speed of a light wave in a certain transparent material is 0.681 times it's speed in vacuum, which is 3.00 x 10^8 m/s. When yellow light with a frequency of 5.21 x 10^14 Hz passes through this material, what is its wavelength in nanometers? ______________ nm ______________ nm

Explanation / Answer

speed V, frequency f and waelenght are related by V = Lf

here as V = 0.681 time 3e8 = 2.043 e8 m/s

so wavelength L = V/f

so L = 2.043e8/5.21e14

L = wavelength = 392.13 nm

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