Why is there thorium in a camera lens? One reason is because of high Refractive Index and Low Dispersion. Thorium oxide has a high refractive index and low dispersion, which can result in sharper, more contrast-rich images. These optical characteristics make the lenses quite desirable for certain kinds of photography. Not only that, the inclusion of thorium in the lens glass allows for more compact lens designs with reduced chromatic aberrations and improved overall image quality, especially when compared to lenses made without it. #radiation #radioactive #physics #chemistry #elements #nuclear #uranium #thorium #thorite #radium #plutonium #alpha #beta #gamma #particles #science #nuclearphysics #danger #radon #hobby #education