Question

1. name the seven colours of a spectrum. 2. what is the sequential arrangement of the seven colours of light in a rainbow? 3. name the phenomenon which results in the formation of a rainbow. 4. experimentally show that white light is composed of seven colours. source of light are the luminous objects. sun is the primary source of light on earth. planets and the moon are non - lumin

Explanation:

1. The seven colours of a spectrum are red, orange, yellow, green, blue, indigo, and violet.
2. The sequential arrangement of the seven colours in a rainbow is due to dispersion of light, with red on the outer - most and violet on the inner - most part. This is called the dispersion phenomenon.
3. Dispersion occurs when white light passes through a prism or in the atmosphere during a rain - shower, splitting into its component colours.
4. Newton's experiments with prisms demonstrated that white light is composed of these seven colours.

Answer:

1. Red, orange, yellow, green, blue, indigo, violet.
2. Dispersion of light.
3. Dispersion occurs when white light passes through a prism or in the atmosphere during rain, splitting into its component colours.
4. Newton used a prism to split white light into its seven - colour components.