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3 answers

It's because they only absorb certain colors and reflect the rest. The absorption spectra of the molecules depends on their structure.

2006-07-03 18:42:51 · answer #1 · answered by Diane D 5 · 2 0

every object reflects a light with special wavelengh . generally all properties of light depend on wavelengh.

2006-07-04 01:52:02 · answer #2 · answered by eshaghi_2006 3 · 0 0

this is bcoz diff. substances have diff. coefficients of absorption,
reflection& transmission for diff. frequencies

2006-07-04 01:52:40 · answer #3 · answered by yoovraj s 2 · 0 0

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