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Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt
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Solved: Since energy is radiated by all objects, why can’t

Chapter 8, Problem 72TAE

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QUESTION:

Since energy is radiated by all objects, why can’t we see them in the dark?

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QUESTION:

Since energy is radiated by all objects, why can’t we see them in the dark?

ANSWER:

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A person can see all light radiation that comes under the standard visible range of light spectrum. The visible spectrum has a radiation wavelength of 380 nm to 750 nm. This range of wavelengths of radiation emitted by any object will be visible to a person.

And above  The light radiation can be visible to a person because, at this temperature, enough radiation is present in the visible spectrum.

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