JEROME WEXLER / SCIENCE PHOTO LIBRARY JEROME WEXLER / SCIENCE PHOTO LIBRARY
Light bulb. An illuminated domestic light bulb, photographed with daylight camera film to show its true colour. Because the human eye adapts automatically to changes in lighting conditions, we often fail to notice the difference between the colour and brightness of daylight and indoor light. Domestic light bulbs emit visible light that is further towards the red end of the spectrum than sunlight, which is why this bulb appears orange.
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