The Visual Testing is one of the most widely used test method to investigate the surface aspect and observe potential discontinuities or failures, which should be detected under proper lighting conditions, monitored by an instrument able to measure the light intensity, the light meter.
Tijaabinta muuqaalka waa mid ka mid ah habka tijaabada ugu ballaaran loo adeegsado si loo baaro muuqaalka dusha sare loona ilaaliyo joojinta ama cilladaha iman kara, taas oo ay tahay in lagu ogaado xaaladaha nalalka ku habboon, oo ay kormeerayaan qalab awood u leh inuu cabbiro heerka iftiinka, mitirka iftiinka