The speed of light in a vacuum = 299 792 458 m / s
Passing through glass slows light, this reduction in speed is also responsible for the bending of light, a phenomenon known as refraction. The speed of light in a material depends on the refraction and frequency of the light, passing through the same material. This effect is called dispersion. In order to answer your question, the refraction "index" and the frequency of the light passing through the crown glass must be known.
Passing through glass slows light, this reduction in speed is also responsible for the bending of light, a phenomenon known as refraction. The speed of light in a material depends on the refraction and frequency of the light, passing through the same material. This effect is called dispersion. In order to answer your question, the refraction "index" and the frequency of the light passing through the crown glass must be known.
