Question

45. Из вакуума в стеклянную пластинку с показателем преломления n падает световое излучение. Какова скорость распространения света в пластине? c - скорость света в вакууме.​

Answer 1

N=sin60/sin45=0,866/0,707=1,225 V=c/n=3*10^8/1,225=2,45*10^8 м/с

Answer 2

Calculation of Light Speed in a Material with Refractive Index

When light travels from a vacuum into a material with a refractive index n, its speed changes. The speed of light in a vacuum is denoted by c. The speed of light in the material can be calculated using the formula:

v = c / n

Where: - v = speed of light in the material - c = speed of light in a vacuum - n = refractive index of the material

This formula indicates that the speed of light in a material is inversely proportional to the refractive index of the material.

Calculation

Using the given information, the speed of light in the material with refractive index n can be calculated as:

v = c / n

This means that the speed of light in the material is the speed of light in a vacuum divided by the refractive index of the material.

Conclusion

Therefore, the speed of light in the material with refractive index n is c / n, where c is the speed of light in a vacuum.

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