Describe the colour and appearance of an opaque object the absorbs all the colours of light.

 

The color of an opaque object is the same as the light that is reflected by it. Why?

Which object can be used to separate white light into the colours of the spectrum?

An oil slick on water displays a variety of iridescent colours due to interference effects. Assuming the film has the minimum thickness to produce the colours observed, what thickness of the oil film will appear green OR red  The index of refraction of the oil is 1.47