A hydrogen discharge lamp emits light with two prominent wavelengths: 656 nm (red) and 486 nm (blue). The light enters a flint-glass prism perpendicular to one face and then refracts through the hypotenuse back into the air. The angle between these two faces is 35. a. Use Figure 35.18 to estimate to {0.002 the index of refraction of flint glass at these two wavelengths. b. What is the angle (in degrees) between the red and blue light as it leaves the prism?
Thursday, May 19, y Lecture 6 Intercellular Chemical Messengers Paracrine • Binds to receptor • Secretory ———> target cell • Can only act upon nearby cells • EX: Histamine causes blood vessels to dilate • Short distance signals Neurotransmitters • Pre and post synaptic neuron • Electricity Hormones • Released into blood • Secretory cells find target cells Neurohormones Membrane Transport Solubility • ECF and ICF • Polar and Nonpolar Size • Small polar molecules can get through protein channels 1 Thursday, May 19, y • Large polar molecules in a carrier Active transport