What is the main factor causing Rayleigh scattering?
A: Defects equivalent to the wavelength scale of the fiber
B: Defects equivalent to the geometric size of the fiber
C: Defects equivalent to the length of the fiber
D: Impurities
A: Defects equivalent to the wavelength scale of the fiber
B: Defects equivalent to the geometric size of the fiber
C: Defects equivalent to the length of the fiber
D: Impurities
举一反三
- What do TEU and FEU mean? A: TEU= Forty-foot equivalent unit; FEU= Twenty-foot equivalent unit B: TEU= Twenty-foot equivalent unit; FEU= Forty-foot equivalent unit C: TEU= Fourteen-foot equivalent unit; FEU= Twelve-foot equivalent unit D: TEU= Twelve-foot equivalent unit; FEU= Fourteen-foot equivalent unit
- The phenomenon of shrinkage and swelling of wood occurs in A: below fiber saturation point. B: above fiber saturation point. C: above or below the fiber saturation point. D: no correlation with fiber saturation point.
- Which description is correct about the deep tendon organ? A: parallel to the extrafugal fiber B: is a sensory receptor for muscle length C: protect the muscle from injury during contraction. D: in series with intrafusal fiber E: sensory signal is transmitted by II afferent nerve fiber
- Which description is correct about the deep tendon organ? A: paralle to the extrafugal fiber B: in series with intrafusal fiber C: is a sensory receptor for muscle length D: sensory signal is transmitted by II afferent nerve fiber E: protect the muscle from injury during contraction.
- Which one has the function of defense and protection A: Matrix B: Collagen fibril C: Collagen fiber D: Elastic fiber E: Reticular fiber