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If the ray of light strikes a surface lower than this angle, it will leave the gem material instead of reflecting through the gem as brilliance.
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If and ray
If, in an unsharp image, a patch of light corresponds to an object point, the center of gravity of the patch may be regarded as the image point, this being the point where the plane receiving the image, e. g., a focusing screen, intersects the ray passing through the middle of the stop.
If there is little rearrangement of radiosity objects in the scene, the same radiosity data may be reused for a number of frames, making radiosity an effective way to improve on the flatness of ray casting, without seriously impacting the overall rendering time-per-frame.
If a ray tracing is then made as if a light wave ( as understood in classical physics ) is wide enough to take both paths, then that ray tracing will accurately predict the appearance of maxima and minima on the detector screen when many particles pass through the apparatus and gradually " paint " the expected interference pattern.
If a mathematical surface can be intersected by a ray, it can be rendered using ray casting.
If the surface at this point faces a light, a ray ( to the computer, a line segment ) is traced between this intersection point and the light.
If the quantity under the square root ( the discriminant ) is negative, then the ray does not intersect the sphere.
* If θ < θ < sub > c </ sub >, the ray will split.
* If θ > θ < sub > c </ sub >, the entire ray reflects from the boundary.
If the incident ray is precisely at the critical angle, the refracted ray is tangent to the boundary at the point of incidence.
If a plane wave, confined to the xz plane, is incident on a dielectric with an angle and wavevector then a transmitted ray will be created with a corresponding angle of transmittance as shown in Fig.
If the lost " recoil energy " is small compared with the energy linewidth of the nuclear transition, then the gamma ray energy still corresponds to the energy of the nuclear transition, and the gamma ray can be absorbed by a second atom of the same type as the first.
If the air near the ground is warmer than that higher up, the light ray bends in a concave, upward trajectory.
* In optics, Hero formulated the Principle of the Shortest Path of Light: If a ray of light propagates from point A to point B within the same medium, the path-length followed is the shortest possible.
If two points are on the same ray in the plane, their distance is defined as the Euclidean distance.
If a mathematical surface can be intersected by a ray, it can be rendered using ray casting.
If the ray passes exactly through a vertex of a polygon, then it will intersect 2 segments at their endpoints.
The issue is solved as follows: If the intersection point is a vertex of a tested polygon side, then the intersection counts only if the second vertex of the side lies below the ray.
If the polygon is specified by its vertices, then this problem is eliminated by checking the y-coordinates of the ray and the ends of the tested polygon side before actual computation of the intersection.
If an atom is at the edge of the grid, any ray which is aimed into the grid directly beside it causes a reflection.
If and light
If she did, he could stand it better in the light.
If the input light distribution falls beyond the visible range, Af as expected, since Af.
If it pleases symphony audiences as a light, jolly piece, a series of impressions musically expressed, it succeeds.
If light moves instantaneously, the telescope does not move, and the true direction of the star relative to the observer can be found by following the line ES.
If appropriate proportions of three primary pigments are mixed, the result reflects so little light as to be called " black ".
If the source emits light uniformly in all directions, the flux can be found by multiplying the intensity by 4π: a uniform 1 candela source emits 12. 6 lumens.
If it is removed, the light ceases.
If the glass is cooled quickly in the absence of a strong light source by putting ice on the glass or placing it in the freezer with the door almost closed, it turns backwards ( i. e. the silver sides trail ).
If light pressure were the cause of the rotation, then the better the vacuum in the bulb, the less air resistance to movement, and the faster the vanes should spin.
If the incident light is monochromatic, these sources all have the same phase.
If light consisted strictly of ordinary or classical particles, and these particles were fired in a straight line through a slit and allowed to strike a screen on the other side, we would expect to see a pattern corresponding to the size and shape of the slit.
If the width of the slits is small enough ( less than the wavelength of the laser light ), the slits diffract the light into cylindrical waves.
If the width of the slits is greater than the wavelength, the Fraunhofer diffraction equation gives the intensity of the diffracted light as:
If the emulsion is dilute enough, higher-frequency and low-wavelength light will be scattered more, and the emulsion will appear bluer-this is called the " Tyndall effect ".
If applied to optical wavelengths, this manifests itself as a change in the colour of visible light as the wavelength of the light is increased toward the red part of the light spectrum.
If the incident light is unpolarised ( containing an equal mix of s-and p-polarisations ), the reflection coefficient is
If a laser is swept across a distant object, the spot of laser light can easily be made to move across the object at a speed greater than c. Similarly, a shadow projected onto a distant object can be made to move across the object faster than c. In neither case does the light travel from the source to the object faster than c, nor does any information travel faster than light.
If Lorentz symmetry can cease to be a fundamental symmetry at Planck scale or at some other fundamental scale, it is conceivable that particles with a critical speed different from the speed of light be the ultimate constituents of matter.
If and strikes
If the batter strikes out to end the inning, it will stay that way.
If a fighter loses consciousness (" goes limp ") as a result of legal strikes, or does not immediately defend himself after a knockdown, he is declared knocked out.
If the cannonball is fired with sufficient velocity, the ground curves away from the ball at least as much as the ball falls — so the ball never strikes the ground.
" If anyone strikes you on the right cheek, turn the other also ; and if anyone wants to sue you and take your coat, give your cloak as well ... Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you.
If the nose probe strikes between one of the cage armour slats, the warhead will function as normal.
If a fire strikes, the gorse flares up quickly.
“ If only there aren ’ t more strikes !”
If a bomblet strikes an armoured vehicle there is also a chance that the shaped charge will ( if used ) penetrate and disable the vehicle.
If the receiver strikes the ball before it crosses a sideline or takes a second bounce on his or her side of the playing surface, the service is considered good and no let is called.
If a fish strikes, the angler can pinch the line with the index finger against the rod handle and lift the rod tip, setting the hook.
If great care is not taken, the ship strikes the rocks and is wrecked.
If the insurgency continued " with DRV support, strikes against the DRV would be extended with intensified efforts against targets north of the 19th parallel.
) If three strikes are recorded against the batter, 2.
If someone strikes you on one cheek, turn to him the other also .” Luke 6: 27-29 ( NIV ) “ Be merciful, just as your Father is merciful .” Luke 6: 36 ( NIV ) “ Do not judge, and you will not be judged.
If it travels a certain distance with two mid-air strikes, the total point is doubled.
If an agreement could not be reached, strikes would begin on 4 March 1989.
* If the wicket keeper moves any part of his person in front of the line of the stumps before either a ) the ball strikes the batsman's person or bat ; or b ) the ball passes the line of the stumps.
If at least one neutron from U-235 fission strikes another nucleus and causes it to fission, then the chain reaction will continue.
: If there ’ s a remedy when trouble strikes,
If the air stream strikes a curved " D " shaped lip, there will be slight turbulence created at the voicing mouth.
If the light is propagating in a material with a higher index of refraction than the material whose surface it strikes, then total internal reflection may occur if the angle of incidence is greater than a certain critical angle.
If protection fails or is absent, lightning that strikes the electrical system introduces thousands of kilovolts that may damage the transmission lines, and can also cause severe damage to transformers and other electrical or electronic devices.
" Lightning strikes the water and the second boy says, " If I had been in that water ...
If the ball strikes any part of the batsman's person ( not necessarily the leg ), and, in the umpire's judgement, the ball would have hit the batsman's stumps but for this interception, then the batsman is out.
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