TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: In the silica particles (a), the usage-amount of silane compound (f) used for surface treatment is 1-50 parts mass with respect to 100 parts mass silica particles before surface treatment, and usage-amount of silane compound (g) used for surface treatment is 1-50 parts mass with respect to 100 parts mass silica particles before surface treatment. The semiconductor nanoparticles (e) have nanoparticle core containing zinc sulfide, zinc selenide, zinc telluride, indium phosphide, indium arsenide, indium antimonide, aluminum sulfide, aluminum antimonide, gallium nitride, gallium phosphide, gallium arsenide, gallium antimonide, lead sulfide, lead selenide, silicon, germanium, magnesium selenide, and/or magnesium telluride. The surface of the nanoparticle core of semiconductor nanoparticles (e) is coated with the at least one shell layer which consists of inorganic materials including capping layer containing protecting group coordinated to the surface of the nanoparticle core. The content of semiconductor nanoparticles (e) in the curable composition, is 0.1-20 %mass. Preferred Property: The number average particle diameter of silica particles before surface treatment is 10-500 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The (meth)acrylate compound (B) contains polyfunctional (meth)acrylate compound (b) containing 3 or more (meth)acryloyloxy groups, and monofunctional (meth)acrylate compound (c) containing one (meth)acryloyloxy group. The (meth)acrylate compound (b) is trifunctional (meth)acrylate compound containing 3 (meth)acryloyloxy groups, preferably trimethylol-propane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, cyclohexane trimethanol tri(meth)acrylate, adamantyl tri(meth)acrylate, adamantane trimethanol tri(meth)acrylate, norbornane trimethylol tri(meth)acrylate, tricyclodecane trimethanol tri(meth)acrylate, perhydro-1,4,5,8-dimethano naphthalene-2,3,7-(oxymethyl)tri(meth)acrylate, tris(acryloxyethyl)isocyanurate, caprolactone-modified tris(acryloxyethyl)isocyanurate and/or di-(2-acryloxyethyl)mono-(2-hydroxyethyl)isocyanurate. The total content of (meth)acrylate (b) and (meth)acrylate (h) in (meth)acrylate compound (B) is 99 %mass or less.