| abstract |
A fluorescent body, according to one embodiment, has as an excitation source a light having a central wavelength within the wavelength range of 350 nm-480 nm, emits visible light having a central wavelength within the wavelength range of 480 nm-680 nm, and is represented by chemical formula aMO-bAlN-cSi 3 N 4 . (M is one element selected from alkaline earth metals, and 0.2≤a/(a+b)≤0.9, 0.05≤b/(b+c)≤0.85, 0.4≤c/(c+a)≤0.9.) |