31. Color-shifting inks reflect various wavelengths in white light differently, depending on the angle of incidence to the surface. 32. The thickness of bolus applied is dependent on the skin dose required and the angle of incidence of the treatment beams. 33. To optimise cruising efficiency, the angle of incidence can be adjusted by pumping fuel between the fore and aft tanks. 34. In this sense the inclination of both faces of the lyre decreases the angle of incidence of sunlight on the clusters. 35. Results vary with one or more than one of viscosity of the fluid, Mach number and angle of incidence changes. 36. In all modern lenses the surface is coated to reduce abrasion, angle of incidence and the angle of refraction are equal. 37. However, the feed does partially obscure the lens when the angle of incidence on the reflector is less than about 45? 38. Hence, observed angles of incidence can be used to compute the direction and speed of a Cherenkov radiation-producing charge. 39. For example, the amplitude of a reflection might increase with the angle of incidence , a possible indicator of natural gas. 40. By varying the angle of incidence and take-off on the crystal, a single X-ray wavelength can be selected.
