Correct option is C
The correct answer is( C). (b), (c) and (e)
Here's why:
(b) Violet light has the lowest speed in a prism:
- Different colors of light have different wavelengths.
- Violet light has the shortest wavelength among visible colors.
- When light enters a denser medium (like a prism), its speed decreases.
- Since violet light interacts more strongly with the prism's material, it slows down the most.
(c) Violet light has the highest refractive index:
- The refractive index of a material is related to how much it bends light.
- Violet light bends the most when passing through a prism (it has the greatest deviation).
- This higher bending indicates a higher refractive index for violet light in the prism.
(e) The formation of a rainbow is due to dispersion:
- Rainbows are formed when sunlight is refracted and dispersed by water droplets in the atmosphere.
- The different colors of light are separated due to their varying speeds and refractive indices in water, creating the beautiful spectrum we see in a rainbow.
Incorrect Options:
(a) Red light is the most abundant in a prism: The abundance of colors in a prism depends on the original light source, not the prism itself.
(d) Red light has the lowest speed in a prism: This is incorrect. As explained earlier, violet light has the lowest speed in a prism.
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