Stock photography picture of coloured postage stamps illuminated by red light see also B3745J for same stamps in daylight

B373FA - Licenced Caption coloured postage stamps illuminated by red light see also B3745J for same stamps in daylight Description black blue green grey and red stamps on a white background are illuminated with red light. The white paper reflects red light as does the red stamp and both appear red so the red stamp virtually disappears. The other stamps absorb red light to varying degrees and appear dark against the paper. see also B3745J for same stamps in daylight Keywords coloured, postage, stamps, red, light, illuminate, absorption, reflection, physics, optics, school, experiment, laboratory