Is the Colour of 620 run light and 780 nm light same? Is the colour of 620 nm light and 621 nm light same? How many colours are there in white light?

The primary colours of light are:

Colours of soap film in sun light is due to

A rose appears red in light of all the colours.

Which colour of the light has the longest wavelength?

Name the extreme colours in pure spectrum of light.

The colour of light not utilized during photosythesis is

A ray of white light is passed through a glass prism and a spectrum is obtained on a screen. (a) Name the seven colours of the spectrum in order. (b) Do the colours have the same width in the spectrum ? (c) Which colour of the spectrum of white light deviates (i) the most, (ii) the least?

The colour of light which has maximum frequency is

What is the shift in the colour of light when the temperature increase?

Name secondary colours of light? How are they formed?