When he added cylindrical reflectors behind his dipole antennas, Hertz could detect radio waves about 20 metres from the transmitter in his laboratory.

When differentiating or integrating in cylindrical coordinates, these unit vectors themselves must also be operated on.

When the House is in session, the mace stands in a cylindrical pedestal of green marble to the right of the chair of the Speaker of the House.

When a meteor strikes earth's atmosphere, a cylindrical region of free electrons is formed at the height of the E layer.

When a drill is used, the cutting apparatus is on the bottom end of a drill barrel, the tube which surrounds the core as the drill cuts downward around the edge of the cylindrical core.

When cylindrical correction is needed, the mathematics used to denote the combination of spherical and cylindrical power in a lens can be notated two different ways to indicate the same correction.

When a Cordyceps fungus attacks a host, the mycelium invades and eventually replaces the host tissue, while the elongated fruiting body ( ascocarp ) may be cylindrical, branched, or of complex shape.

When Cheez Whiz is advertised as a dip or a sauce, the jars are larger and more of a squat cylindrical shape.

When the operator turns the power handle, the cylindrical drum makes a complete revolution through all 27 bars.

When one has a cylindrical error, one has astigmatism.

When a cylindrical boiler failed, it usually fractured along its length owing to the high hoop stress in the wall.

When it opened, the cylindrical central tower was originally the flagship of the Westin Hotels.

When it is made in flat material in the manner used to fasten a necktie, the working end is brought more parallel to the standing part during tightening than generally seen when made in cylindrical cordage for load-bearing purposes.

When inserted into vesicular membranes, the porous cylindrical assemblies mediate transport of protons across the membrane.

When a pair of wheel bugs encounter each other and mate, the female will lay 40-200 small, brown, cylindrical eggs on a tree twig, and eventually die.

When proceeding from open water towards harbor, marks with cylindrical topmarks or square dayboards are kept to port in both regions, but colors and numbers are reversed.

When a Ghyben-Herzberg lens is fully formed, its floating nature will push a freshwater head above mean sea level, and if the island is wide enough, the depth of the lens below mean sea level will be 40 times the height of the water table above sea level.

When it emerges from the specimen, the electron beam carries information about the structure of the specimen that is magnified by the objective lens system of the microscope.

When refracted by a diffraction-limited lens, a Gaussian beam is transformed into another Gaussian beam ( characterized by a different set of parameters ), which explains why it is a convenient, widespread model in laser optics.

When the object is not distant from the lens, however, the image is no longer formed in the lens's focal plane, and the f-number no longer accurately describes the light-gathering ability of the lens or the image-side numerical aperture.

When used with a parabolic reflector or lens antenna, the phase center of the horn is usually placed at the focal point of the reflector, with the 3 dB points of the horn's radiation pattern set to be at the edge of the reflector.

When the lens first contacts the eye, it should be comfortable.

When the camera lens is not removed ( or cannot be removed ) a common method used is afocal photography, also called afocal projection.

When informed that no lens currently had a wide enough aperture to shoot a costume drama set in grand palaces using only candlelight, Kubrick bought and retrofitted a special lens for these purposes: a modified Mitchell BNC camera and a Zeiss lens manufactured for the rigors of space photography, with a maximum aperture of f /. 7.

When a bright light source is shining on the lens but not in its field of view, lens flare appears as a haze that washes out the image and reduces contrast.

When using an anamorphic lens, as is common in analog cinematography, lens flare can manifest itself as a horizontal lines.

Image: Firework with lens flare. jpg | When the subject of a photo is the light source itself, lens flare can be a desirable and dramatic effect.

When projected through a matching fisheye lens onto a dome, the original panoramic view is recreated.

When the Leica launched, this lens was renamed the ELMAX, for E Leitz and MAX Berek.

When the shutter release is pressed, a light-blocking shield lifts and the shutter disc rotates a full turn exposing the film through its open sector ; when the pressure is released the light-blocking shield returns to its position behind the lens, and the spring motor advances the film and recocks the shutter.

When closed, the viewfinder and lens windows are protected.

When under water, the eyeball's lens serves to focus light, whereas in the in-air environment, the typically bright light serves to contract the specialized pupil, resulting in sharpness from a smaller aperture ( similar to a pinhole camera ).

When we try to focus on far away objects, the ciliary muscles stretch the eye lens, making it thinner, and hence changing the focal length.

When the mirror above the lens is moved too high or too low, it moves out of the best focal distance for an evenly white image, resulting in a projected image with either blue or brown color fringing around the outside edge of the screen.

When Secretary Stanton did not join the President's opposition to the Reconstruction acts, Johnson decided to dismiss him together with his radical subordinates.

When awarded for acts of heroism, the medal is awarded with the " V " Device.

When this involves having sex with, or performing certain actual sexual acts for another person in exchange for money or something of value, it is called prostitution.

When acting as Lord of Mann, the Queen acts on the advice of the Secretary of State for Justice and Lord Chancellor of the United Kingdom having prime responsibility as Privy Counsellor for Manx affairs.

When it acts on a tensor product of two state vectors, it exchanges the values of the state vectors:

When a ferromagnet or ferrimagnet is sufficiently small, it acts like a single magnetic spin that is subject to Brownian motion.

When a prion enters a healthy organism, it induces existing, properly folded proteins to convert into the disease-associated, prion form ; the prion acts as a template to guide the misfolding of more proteins into prion form.

When dragged through the ground, it leaves a channel deep under the ground, and this acts as a drain.

When King Aistulf of the Lombards availed himself of the Italian dissent and invaded the Exarchate of Ravenna in 751, one of his first acts was to institute a crushing poll tax of one gold solidus per head on every Roman citizen.

When the Force is attached, either to the front or back, it acts as a weapons system and will fire in whatever direction it is facing.

When sailing close to the wind the force generated by the sail acts at 90 ° to the sail.

When one is performing acts that harm the land or other living things, prayers and rituals are performed to placate the Kami of the area.

When a cement kiln is fired by coal, the ash of the coal acts as a secondary raw material.

When the edition of the acts of the colloquy, as prepared by Jakob Andrea, was published, Samuel Huber, of Burg near Bern, who belonged to the Lutheranizing faction of the Swiss clergy, took so great offense at the supralapsarian doctrine of predestination propounded at Mömpelgard by Beza and Musculus that he felt it to be his duty to denounce Musculus to the magistrates of Bern as an innovator in doctrine.

When is small compared with-, the device acts like a voltage controlled resistor.

When a plane wave of wavelength λ with normal incidence, ( perpendicular to the grating ) each slit in the grating acts as a quasi point-source from which light propagates in all directions ( although this is typically limited to a hemisphere ).

When a surface is illuminated by a light wave, according to diffraction theory, each point on an illuminated surface acts as a source of secondary spherical waves.

When a Roman commander is slaughtered, in most cases, it is taken as a sign that a state of war is in existence, and if we can associate the death of Heraclianus in 270, as well as an inscription from Bostra, recording the rebuilding of a temple destroyed by the Palmyrene army, then these violent acts could be interpreted the same way.

When light shines on a circular obstacle, Huygens ' principle says that every point in the plane of the obstacle acts as a new point source of light.

* When the subring is isomorphic to the dual number plane, then g acts as a shear mapping and preserves the dual angle.

* When the subring is isomorphic to the split-complex number plane, then g acts as a squeeze mapping and preserves the hyperbolic angle.

* When the subring is isomorphic to the ordinary complex number plane, then g acts as a rotation and preserves the Euclidean angle.

When two nanowires acting as photon waveguides cross each other the juncture acts as a quantum dot.

When chewed, coca acts as a mild stimulant and suppresses hunger, thirst, pain, and fatigue.

When Damala's mistress ( who injected him with heroin between acts of plays he was appearing in ) had an illegitimate daughter by him in 1889, she left the baby in a basket ( with a note ) on Sarah Bernhardt's doorstep.