Question

some people have suggested disposing of our nuclear waste products in the sun. however, this is a major safety issue, because the launch vehicle could explode and disperse nuclear waste in a wide area. suppose that plutonium - 239, a major nuclear waste product, has major absorption lines at 0.62 micrometers and 1.37 micrometers, with many other minor absorption lines. using what you know about spectroscopy, describe how such waste disposal in a star could leave lingering evidence in space, even in distant galaxies. note that the light from stars may be redshifted or blueshifted because of the star’s relative motion to other objects in the galaxy.

Explanation:

When light from a star (where nuclear waste like plutonium - 239 is disposed) travels through space, it can be analyzed using spectroscopy. Plutonium - 239 has specific absorption lines (0.62 micrometers and 1.37 micrometers with minor ones). Even if the star's light is redshifted or blueshifted (due to relative motion), the pattern of these absorption lines (their relative positions and intensities) is characteristic of plutonium - 239. Spectroscopic analysis of light from distant galaxies can detect these unique patterns. The absorption lines are like a "fingerprint" of plutonium - 239. Redshift or blueshift would change the absolute wavelength of the lines (e.g., if redshifted, the 0.62 - micrometer line would have a longer wavelength), but the ratio of wavelengths between the different absorption lines of plutonium - 239 would remain consistent. Astronomers can use this ratio and the overall pattern (including the presence of minor lines) to identify the signature of plutonium - 239 in the star's spectrum.

Answer:

Spectroscopic analysis of starlight (even from distant galaxies) can detect the characteristic absorption - line pattern (including the ratio of wavelengths between lines and the presence of minor lines) of plutonium - 239, which would be a lingering evidence of nuclear - waste disposal in a star, accounting for redshift or blueshift by looking at the relative line - wavelength relationships.