Question

its time for the unit exam. this is your opportunity to show how much you have gained from all the work youve done. if you dont feel ready, you may want to stop and clarify anything you do not understand. it may also be a good idea to go over any notes you have taken and review the key terms. good luck! note: to answer some of the questions, it may help to reference a periodic table. which statement describes how an understanding of emission line spectrum can be used in everyday life? visible wavelengths of light that are emitted by atoms can be used to produce lighted signs for storefronts. visible wavelengths of light that are emitted by atoms can be used to produce x - ray images of internal organs. visible wavelengths of light emitted by atoms can be used to produce a signal transmitted by a television remote. visible wavelengths of light that are emitted by atoms can be used to detonate explosive devices remotely.

Explanation:

The emission line spectrum involves atoms emitting light at specific wavelengths. Neon - lights (used for storefront signs) work based on the emission of visible - light wavelengths by atoms in a gas discharge. X - rays are not visible light and are produced by different mechanisms than atomic emission of visible light. Television remotes use infrared light, not visible light from atomic emission. Remote detonation of explosive devices does not rely on atomic emission of visible light.

Answer:

Visible wavelengths of light that are emitted by atoms can be used to produce lighted signs for storefronts.