In photography, exposure is the amount of light per unit area (the image plane illuminance times the exposure time) reaching a frame of photographic film or the surface of an electronic image sensor, as determined by shutter speed, lens aperture, and scene luminance. Exposure is measured in lux seconds, and can be computed from exposure value (EV) and scene luminance in a specified region.
An "exposure" is a single shutter cycle. For example, a long exposure refers to a single, long shutter cycle to gather enough dim light, whereas a multiple exposure involves a series of shutter cycles, effectively layering a series of photographs in one image. The accumulated photometric exposure (Hv) is the same so long as the total exposure time is the same.
Mawazo na mpangilio wa hoja wa Mhe. Mwigulu Nchemba unakosa ladha ya utaalamu wa uchumi. Anajadili issues too theoretical au kama mtu aliyehitimu darasani akahama na skills za darasani kwenda kuongoza.
Kwa nchi hii na rasilimali tulizonazo zinazonufaisha wageni inasikitisha kuona Waziri...
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