Anyị niile maara na e nwere agba dị iche iche dị iche iche dị iche iche.Ìhè bụ ebili mmiri electromagnetic, dị ka wavelength ya si dị, nke nwere ike kewaa n'ime ultraviolet ìhè (1nm-400nm), ìhè anya (400nm-700nm), green ìhè (490 ~ 560nm), red ìhè (620 ~ 780nm) na infrared ìhè. (700nm na...
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