The formation of glittering colours in thin foam of soap is the result of which of the following phenomenon –

Which one of the following phenomenon is used in optical fibres?

Which one of the following colours is seen in the middle of a Rainbow?

A glass prism splits white light into different colours. This phenomenon is called dispersion of light by prism. Which one of the following statements is correct ?

Which of the following are the primary colours of light?

Which of the following is the reason behind the faster travel of information in a fibre optic cable than copper wire ?