Explain the origin of the blue colour of sky.

Explain the following: The colour of potassium dichromate

Explain the term sky wave

A narrow beam of white light passes through a triangular glass prism and gets split up into seven colours marked 1 to 7. A student makes the following statements about the spectrum observed on the screen: " The colours at positions marked 3, 4 and 5 are similar 'to the colour of the sky, leaf and sunflower respectively." Is the above statement made by the student correct or incorrect ? Justify.

Explain the observation that gave Newton the idea that sunlight is made of seven colours.

What is the colour of the litmus solution when it is neither acidic nor basic?

Explain the following observations: Sky appears blue in colour.

Name the phenomenon that explains the colours of the films.

Explain what is red shift and blue shift of light wave.