In TBR - Physics book 2, if you take a look at the section which discusses Snell's law, page 240 - it says quite clearly that if n2 > n1, the ray bends more towards the normal and if n2 < n1, the ray bends away from the normal. n2 and n1 are refractive indexes. Assuming ray goes from medium 1, to medium 2.
Now take a look at example 10.6 a. The example talks about 2 rays, A and B, and A bends more than B. The conclusions I draw from that example is - 1) the ray that bends more i.e., away from the normal, has a higher refractive index, higher frequency, lower speed, lower wavelength. And I think all those conclusions are fine knowing that Violet refracts more than Red when a ray of light splits inside a medium.
Does anybody find this confusing? I mean, the first example says that the ray that bends more towards the normal has higher refractive index and the second example says the ray that bends away from the normal has a higher refractive index. Is there a distinction to be made between refractive index of medium v/s refractive index of ray? So in the first example they talk about refractive index of medium but in the second example they talk about 'dispersion' and refractive indexes of rays of light.
Now take a look at example 10.6 a. The example talks about 2 rays, A and B, and A bends more than B. The conclusions I draw from that example is - 1) the ray that bends more i.e., away from the normal, has a higher refractive index, higher frequency, lower speed, lower wavelength. And I think all those conclusions are fine knowing that Violet refracts more than Red when a ray of light splits inside a medium.
Does anybody find this confusing? I mean, the first example says that the ray that bends more towards the normal has higher refractive index and the second example says the ray that bends away from the normal has a higher refractive index. Is there a distinction to be made between refractive index of medium v/s refractive index of ray? So in the first example they talk about refractive index of medium but in the second example they talk about 'dispersion' and refractive indexes of rays of light.
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