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Question

An engineer is investigating objects that can be used as a solar collector. One of

the objects considered is the object made of aluminum and is coated with lead

sulfate. Investigation shows that the reflectivity of this object is 0.2 for radiation

at wavelengths less than 3.3 μm and 0.95 for radiation greater than 3.3 μm. In

order to get better insight into the behavior of the object, as a candidate for a

solar absorber, the object is then exposed to two different conditions: a solar

radiation (T ~ 5800 K) and a room temperature (T ~ 300 K). What is the energy

reflected by the object at these two conditions?

Tagged in

Engineering

Mechanical Engineering

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