Some animals use pigments to give them bright colours, while others use complex

Question

Some animals use pigments to give them bright colours, while others use complex microscopic structures. This is called iridescence, and is used by many birds such as peacocks and hummingbirds, as well as some insects. How could you determine whether pigment or iridescence is being used by a particular animal?

Which of the following is the correct answer:

A colour caused by iridescence is bright and 'metallic' looking and the colour does not change as the viewing angle varies.

Colours due to pigments vary with viewing angle.A colour caused by iridescence is bright and 'metallic' looking and the colour changes as the viewing angle varies. Colours due to pigments do not vary with viewing angle.

A colour caused by iridescence is dark and 'soft' looking and the colour does not change as the viewing angle varies. Colours due to pigments vary with viewing angle.

A colour caused by iridescence is dark and 'soft' looking and the colour changes as the viewing angle varies. Colours due to pigments do not vary with viewing angle.

Explanation / Answer

answer 2 is correct i.e.

A colour caused by iridescence is bright and 'metallic' looking and the colour changes as the viewing angle varies. Colours due to pigments do not vary with viewing angle.

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