The angle, usually fixed, between the chord line of a wing or horizontal stabilizer and the axis of the fuselage, measured at the root. In UK called the angle of attack
the angle that energy rays make with a line perpendicular to a surface The angle of incidence determines the percentage of direct energy intercepted by a surface The rays that are perpendicular to a surface are said to be "normal" to that surface
Angle between the normal to a surface and the direction of incident radiation; applies to the aperture plane of a solar collector Most modern solar panels have only minor reductions in power output within plus/minus 15 degrees The loss is a function of the cosine, so at 45 degree angle, output drops off by about 30%
In reference to solar energy systems, the angle at which direct sunlight strikes a surface; the angle between the direction of the sun and the perpendicular to the surface Sunlight with an incident angle of 90 degrees tends to be absorbed, while lower angles tend to be reflected
the designed angle between the chordline of a hydroplane's wing and the water surface; the angle is fixed for ram wings but adjustable for auxiliary devices such as the horizontal stabilizer
(1) The angle between the direction of incoming EMR and the normal to the intercepting surface; (2) In SLAR systems this is the angle between the vertical and a line connecting the antenna and the target
A fixed angle between the plane of the wing chord and the line of thrust or any other longitudinal line which is level when the fuselage is level longitudinally
When light strikes a surface it forms an angle with an imaginary line known as the : normal, which is perpendicular to the surface The angle created between the incident ray and the normal is referred to as the angle of incidence
Angle between the reference axis (x-axis) of an airfoil and the reference axis of the aircraft (e g fuselage center line) Constant, built into the aircraft
This term is defined as the angle of the incoming light with respect to the polarizer The standard convention of normal incidence being zero degrees is used
gen The angle between the line of direction of anything (as a ray of light or line of sight) striking a surface and a line perpendicular to that surface drawn to the point of contact (see figure ) [MIL-HDBK-1908B]
the angle that a ray (of solar energy, for example) makes with a line perpendicular to the surface For example, a surface that directly faces the sun has a solar angle of incidence of zero, but if the surface is parallel to the sun (for example, sunrise striking a horizontal rooftop), the angle of incidence is 90° The figure accompanying the description of airmass illustrates a solar angle of incidence of 48 2° to a horizontal surface