<P> When light shines onto a bubble it appears to change colour . Unlike those seen in a rainbow , which arise from differential refraction , the colours seen in a soap bubble arise from interference of light reflecting off the front and back surfaces of the thin soap film . Depending on the thickness of the film , different colours interfere constructively and destructively . </P>
<P> When light shines onto a bubble it appears to change colour . Unlike those seen in a rainbow , which arise from differential refraction , the colours seen in a soap bubble arise from interference of light reflecting off the front and back surfaces of the thin soap film . Depending on the thickness of the film , different colours interfere constructively and destructively . </P>
colours seen in soap bubbles are due to
colours seen in soap bubbles are due to
interference of light reflecting off the front and back surfaces of the thin soap film
interference of light reflecting off the front and back surfaces of the thin soap film