Question

How is the refractive inderda medinem
related to the speed of light ? out on an
exaretliên tay Seractive sides fa midis
with respect to another in
terms &
heed of light in these two media?​

Answer 1

Answer:

Speed, frequency, and wavelength of light are related by the following expression:

image

In different optical media, speed and wavelength of light change, but frequency is constant. Color depends on frequency, so that the color of a ray of light is not altered as it passes through optical media except by selective nontransmittance or fluorescence. The optical characteristics of a substance can only be defined with respect to clearly specified frequencies of light. A substance to be used for lenses to refract visible light is usually tested with the yellow sodium light (D line) and the blue (F line) and the red (C line) of a rarefied hydrogen discharge tube.

In a vacuum, the speed of all frequencies of light is the same (approximately 3 × 108 meters per second). Since the frequency of the yellow D line is approximately 5 × 1014 Hz, the wavelength of this line in a vacuum is approximately 6 × 10–7 m (0.6 μm). Similarly, the wavelengths in a vacuum of the blue F and red C lines are approximately 5 and 7 × 10–7 m, respectively.

Explanation: