Red light travels faster than blue light when both of them pass through a glass prism because the
refractive index of red light is grester than that of blue light
refractive index of blue light is greater than that of red light
red light is more intense than the blue light
blue light is more intense than the red light
Explanation
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When light passes through a medium like glass, its speed and direction change due to the change in its refractive index. The refractive index of a material is a measure of how much the speed of light is reduced when it passes through the material compared to its speed in a vacuum.
In general, shorter wavelengths (like blue light) experience a greater change in speed and direction compared to longer wavelengths (like red light) when passing through a medium like glass. This means that the refractive index of blue light is typically higher than that of red light. Therefore, blue light bends more than red light when passing through a prism, leading to the separation of colors in a spectrum.
Another point to always remember here is that the lower(smaller) the refractive index
the higher the speed of light and the higher (larger/greater) the refractive index the lower the speed of light
thus making option B Correct 
Myschool pls make appropriate correction to this
this is B
you guys should please make corrections 
just stopped me from getting my first 300
think of light as a runner
when light passes through prism it runs very fast, but different colours have different speed.
Red light----- fast runner
Blue light----- slow runner
so what causes blue to be slow?
the slowing doen depends in something called refractive index.
higher refractive index---- light moves slower
lower refractive index---- light moves faster
so the correct answer is B
The correct answer is: B
Explanation:
When light passes through a medium such as a glass prism, its speed and direction are affected by the refractive index of the medium for that particular wavelength of light. The refractive index is a measure of how much a wave (like light) slows down in a given medium compared to its speed in a vacuum.
Blue light has a shorter wavelength compared to red light, and as a result, it interacts more strongly with the atoms in the glass. This stronger interaction causes blue light to have a higher refractive index in glass, meaning it slows down more and bends more when passing through the prism.
Red light, with its longer wavelength, has a lower refractive index in the same medium, so it travels faster and bends less than blue light.
Thus, because the refractive index for blue light is greater, blue light slows down more and is refracted (bent) more than red light when passing through a prism, while red light travels faster through the prism.
@myschool please change this !!!
