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ফটোগ্রাফিক ফ্ল্যাশ লাইটে প্রধানত কি গ্যাস ব্যবহার করা হয়?
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Descrption
<p class = "MsoNormal">A flash is a device used in <a title = "Photography" href = "https://en.wikipedia.org/wiki/Photography"><span style = "color: windowtext;">photography</span></a> producing a flash of <a title = "Lighting" href = "https://en.wikipedia.org/wiki/Lighting"><span style = "color: windowtext;">artificial light</span></a> (typically 1/1000 to 1/200 of a second) at a <a title = "Color temperature" href = "https://en.wikipedia.org/wiki/Color_temperature"><span style = "color: windowtext;">color temperature</span></a> of about 5500 <a title = "Kelvin" href = "https://en.wikipedia.org/wiki/Kelvin"><span style = "color: windowtext;">K</span></a>[<a title = "Wikipedia:Citation needed" href = "https://en.wikipedia.org/wiki/Wikipedia:Citation_needed"><span style = "color: windowtext;">citation needed</span></a>] to help illuminate a scene. A major purpose of a flash is to illuminate a dark scene. Other uses are capturing quickly moving objects or changing the quality of light. Flash refers either to the flash of light itself or to the electronic flash unit discharging the light. Most current flash units are electronic, having evolved from single - use flashbulbs and flammable powders. Modern <a title = "Camera" href = "https://en.wikipedia.org/wiki/Camera"><span style = "color: windowtext;">cameras</span></a> often activate flash units automatically.</p>
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