A sombra de um raio laser pode ser vista como uma pequena linha escura que atravessa a luz azul. R. A. Abrahão, H. P. N. Morin, J. T. R. Pagé, A. Safari, R. W. Boyd, J. S. LundeenUma nova experiência demonstrou algo aparentemente impossível: a luz que projecta a sua própria sombra. Quando um...
A vista da ISS enquanto orbita sobre a linha de terminação conhecida como zona crepuscular. NASAUma fotografia diária tirada de setembro de 2023 a setembro de 2024 oferece uma visão intrigante da transição da zona crepuscular causada pela inclinação axial de 23,5 graus da Terra durante a sua órbita em torno do Sol.Sem a...
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