Question

Observe the diagramand answer the below mentioned questions.

(a) Complete the diagram if PQ is a ray of light, ABC is a glass prism and DE is a screen.
(b) Define the phenomenon demonstrated in the above diagram. (c) How did Newton demonstrate that white light consists of seven colours?
(d) How is rainbow formed?

Answer 1

Answer:

A painting in the BOA Museum shows Newton allowing light, via a prism, to reveal the spectrum on a piece of white card resting on a chair. ... He named the seven colours of the spectrum red, orange, yellow, green, blue, indigo and violet.

A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.