Correct option is A
A spectrum is formed when white light passes through a prism and each color is refracted at a different angle, separating the light into its component colors. This is commonly referred to as dispersion, where the different wavelengths of light are spread out.
1. Spectrum:
A spectrum is the band of colors (such as red, orange, yellow, green, blue, indigo, and violet) that is produced when white light is dispersed by a prism.
2. Colour image:
A color image is a visual representation with varying colors, but it does not specifically refer to the dispersion of light through a prism.
3. Colour spread:
While this could describe the separation of colors, it is not the specific term for the phenomenon that occurs when light passes through a prism.
4. Rainbow:
A rainbow is a natural phenomenon caused by the dispersion of sunlight in water droplets, but the term "spectrum" is more accurate in the context of light through a prism.
