University of Lagos - Lagos

Thursday, 9 August 2018
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Item details

City: Lagos » Alimosho
Offer type: Offer

Contacts

Contact name Dr James
Phone 09063838910

Item description

University of Lagos 2018/2019 post UTME Late Registration is on. Contact the School on 09063838910 for assistance in purchasing your Form and Registration. Also Predegree Form, Direct Entry, Post Graduate and Masters Form is also out and on sale hurry now to purchase your form before the close date for more details call the school on 09063838910 The altitudes where auroral emissions occur were revealed by Carl Størmer and his colleagues, who used cameras to triangulate more than 12,000 auroras.[14] They discovered that most of the light is produced between 90 and 150 km above the ground, while extending at times to more than 1000 km. Images of auroras are significantly more common today than in the past due to the increase in the use of digital cameras that have high enough sensitivities.[15] Film and digital exposure to auroral displays is fraught with difficulties. Due to the different color spectra present, and the temporal changes occurring during the exposure, the results are somewhat unpredictable. Different layers of the film emulsion respond differently to lower light levels, and choice of a film can be very important. Longer exposures superimpose rapidly changing features, and often blanket the dynamic attribute of a display. Higher sensitivity creates issues with graininess.