PrepTest C2, Section 3, Question 2
Because metallic mirrors absorb some light, they waste energy. When light strikes a metallic mirror, electrons in the mirror move, using energy and dimming the reflected image. As a result, metallic mirrors cannot be used in applications in which minimizing energy loss is important, such as high-powered lasers.
Because metallic mirrors absorb some light, they waste energy. When light strikes a metallic mirror, electrons in the mirror move, using energy and dimming the reflected image. As a result, metallic mirrors cannot be used in applications in which minimizing energy loss is important, such as high-powered lasers.
Because metallic mirrors absorb some light, they waste energy. When light strikes a metallic mirror, electrons in the mirror move, using energy and dimming the reflected image. As a result, metallic mirrors cannot be used in applications in which minimizing energy loss is important, such as high-powered lasers.
Because metallic mirrors absorb some light, they waste energy. When light strikes a metallic mirror, electrons in the mirror move, using energy and dimming the reflected image. As a result, metallic mirrors cannot be used in applications in which minimizing energy loss is important, such as high-powered lasers.
Which one of the following most accurately expresses the argument's main conclusion?
Metallic mirrors reduce the effectiveness of high-powered lasers.
Part of the light falling on metallic mirrors tends to be absorbed by them.
High-powered lasers require mirrors that conserve energy.
A tendency to waste energy is the most significant disadvantage of metallic mirrors.
Metallic mirrors are unsuitable for applications where it is crucial to minimize energy loss.
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