Estimate how many photons of yellow light $$($$λ $$=$$ $$575$$ $$nm)$$ must be absorbed by $$1.0$$ $$cm3$$ of human skin to raise the skin temperature by $$1.0$$ °C. Assume that the photon energy is absorbed by $$1.0$$ $$cm3$$ of tissue. As rough estimates of the tissue's density and specific heat, use the values for water.

Question

Estimate how many photons of yellow light $$($$λ $$=$$ $$575$$ $$nm)$$ must be absorbed by $$1.0$$ $$cm3$$ of human skin to raise the skin temperature by $$1.0$$ °C. Assume that the photon energy is absorbed by $$1.0$$ $$cm3$$ of tissue. As rough estimates of the tissue's density and specific heat, use the values for water.

Infinity Learn · Accepted Answer

ms∆$$T=E$$ ; Vds ∆$$T=nhc$$λ$$n=Vds$$ΔTλhc $$=10-6$$×$$103$$×$$4200$$×$$1$$×$$575$$×$$10-96.6$$×$$10-34$$×$$3$$×$$108$$ $$=1.2$$×$$1019$$

Estimate how many photons of yellow light ( $λ$ = 575 nm) must be absorbed by 1.0 cm³ of human skin to raise the skin temperature by 1.0 °C. Assume that the photon energy is absorbed by 1.0 cm³of tissue. As rough estimates of the tissue's density and specific heat, use the values for water.

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Estimate how many photons of yellow light (λ = 575 nm) must be absorbed by 1.0 cm3 of human skin to raise the skin temperature by 1.0 °C. Assume that the photon energy is absorbed by 1.0 cm3 of tissue. As rough estimates of the tissue's density and specific heat, use the values for water.

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Ready to Test Your Skills?

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Estimate how many photons of yellow light ( $λ$ = 575 nm) must be absorbed by 1.0 cm³ of human skin to raise the skin temperature by 1.0 °C. Assume that the photon energy is absorbed by 1.0 cm³of tissue. As rough estimates of the tissue's density and specific heat, use the values for water.