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lovemichelle638
29.08.2019 •
Physics
The speed of a light wave in a certain transparent material is 0.6310.631 times its speed in vacuum, which is 3.00×108 m/s3.00×108 m/s . when yellow light with a frequency of 5.15×1014 hz 5.15×1014 hz passes through this material, what is its wavelength in nanometers
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Ответ:
367.57 nm
Explanation:
Given that the speed of the light in certain material is 0.6310 times the speed of light in vacuum.
Speed of light in vacuum = 3×10⁸ m/s
Speed of the light in that material = 0.6310×3×10⁸ m/s = 1.893×10⁸ m/s
The frequency of the light does not change but the wavelength of the light changes with change in the speed when light travels from one medium to another.
Thus, frequency = 5.15×10¹⁴ Hz
Using,
c = frequency × Wavelength
Wavelength = c / frequency = (1.893×10⁸ m/s) / (5.15×10¹⁴ Hz) = 367.57×10⁻⁹ m
Also,
1 nm = 10⁻⁹ m
So, wavelength = 367.57 nm
Ответ:
16
Step-by-step explanation:
26.42 is estimated to 26
-9.8 is estimated to -10
Then you subtract positive 26 minus negative 10 and you get 16.