Candles on a cake, Schlieren image

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Candles on a cake, Schlieren image

Candles on a cake, Schlieren image. The candle flames (white, lower centre) are heating air that is seen coiling (blue, red and yellow) as it rises. Schlieren photography is used to visualize density changes in transparent materials. This change in density causes light passing through a material to change direction (refraction). This property is measured by the refractive index of a material. A filter is then used to colour the light depending upon the amount it is deflected by the density change. Hot air is less dense than the surrounding air, which is also why it rises

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Media ID 1697815

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Burning Cake Candle Candles Combustion Currents Density Filter Flame Flames Heat Image Motion Action Move Movement Moving Optical Optics Photography Refracted Refraction Refractive Index Rising Scientific Technique Techniques Temperature Birthday Filtered

EDITORS COMMENTS
This print titled "Candles on a cake, Schlieren image" captures the mesmerizing beauty of candle flames and the scientific phenomenon behind it. In this Schlieren image, we witness the enchanting dance of air as it coils in vibrant hues of blue, red, and yellow while rising due to the heat generated by the candles. Schlieren photography is an ingenious technique used to visualize density changes in transparent materials. As light passes through a material with varying densities, such as hot air rising from a flame, its direction is altered or refracted. This change in direction is measured by the refractive index of the material and can be visualized using specialized filters that colorize the light based on its deflection caused by density changes. The lower center of this image showcases white candle flames heating up surrounding air which then rises upwards. The hotter air becomes less dense compared to its surroundings, creating convection currents known as thermal plumes. Through schlieren photography, we gain insight into these invisible movements within our environment. This remarkable photograph not only highlights the science behind combustion and heat transfer but also serves as a testament to how optical techniques like schlieren photography enable us to explore and understand complex phenomena occurring around us. It's an exquisite blend of artistry and scientific exploration captured by Science Photo Library for all enthusiasts who appreciate both beauty and knowledge.

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