Radiation emitted from human skin reaches its peak at λ = 980 µm. What is the frequency of this radiation? Planck’s constant is 6.63 × 10−34 J · s. Answer in units of Hz. What type of electromagnetic waves are these? How much energy is carried by one quantum of these electromagnetic waves? Answer in units of eV.

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Radiation emitted from human skin reaches
its peak at λ = 980 µm.

What is the frequency of this radiation?
Planck’s constant is 6.63 × 10−34 J · s.
Answer in units of Hz.

What type of electromagnetic waves are
these?

How much energy is carried by one quantum
of these electromagnetic waves?
Answer in units of eV.

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