Observing the Jumping Laser Dogs

Abstract

Jumping sun dogs are rapid light flashes changing over clouds, with some of them located close to the places of halo formation in thunder storms clouds. This paper presents an outline of some aspects that are required for understanding the jumping sun dogs, using some experiments with light scattering in complex fluids. In our analogy, we have observed the jumping laser dogs, in which the ice crystals are replaced by needlelike structures of ferrofluid, the electric field in the atmosphere is represented by an external magnetic field, and the laser beam scattered by the ferrofluid structure has the same role of the sun as the source of light scattered by the ice crystals subjected to changing electric fields in thunderstorm clouds.

Derivation of equations of the model of the dynamic behaviour of the three-dimensional atmospheric cloud of electrically charged ice crystals under the influence of electrostatic forces

“…Later, in [4] a hypothesis explaining an atmospheric optical phenomenon commonly called the miracle of the sun as a result of the passing of sunlight through a synchronously vibrating electrically charged cloud of ice crystals was presented. This hypothesis was then extended to other similar phenomena by other authors [5]. In the following years, the theoretical model of vibrations of synchronous clouds of electrically charged ice crystals was extended.…”

Observing Dynamical Systems Using Magneto-Controlled Diffraction

“…In this way, the image obtained from the Ferrolens in Figure 2a is related to the magnetic field obtained with the gaussmeter of Figure 4b, and the light pattern of Figure 2b is associated with the magnetic field of Figure 4d. One way to see directly what is happening inside the Ferrolens is by obtaining the polarimetry of the Ferrolens, see References [2][3][4]10] for more detailed discussions about the light polarization effects of this device. We observed that the nanoparticles create a diffracting grating following the orientation of the magnetic field, forming a needle-like structure locally.…”

“…The observed pattern suggests a resemblance of the polarimetry of Ferrolens with the concept of spatial mode of Equation 3and other hypergeometric polynomials empirically. We have approximated the intensity of light polarization I observed for magnetic field B [2,10] as…”

“…The stability of different types of attractors is related to the distribution of singular points around them, as in the case of the mechanical stability, which is represented by the potential energy of some object disturbed by small displacements, with stable, unstable, and indifferent equilibrium, so that we can describe the motion of this object subjected to Newton's law of mechanics. This work aims to present a similar task, by using light and magnetic fields, inspired by the observation of light patterns in the Ferrolens [2], a device based on a Hele-Shaw cell containing ferrofluid, which can control light, acting as a magnetic lens. The potential applications for this kind of device is remarkable, for example the observation of light patterns in ferrofluids motivated some authors: to compare them with some atmospheric optics phenomena [2]; or to understand the cause behind the existence of light patterns [3], known as magnetic contours; or considering the ferrofluids as "smart nanofluid" [4], we can find some interesting studies of the optical properties controlled by an external magnetic field, such as the formation of ring structures of light in scattered patterns [5]; or in some exciting applications such as liquid robotics [6].…”

“…This work aims to present a similar task, by using light and magnetic fields, inspired by the observation of light patterns in the Ferrolens [2], a device based on a Hele-Shaw cell containing ferrofluid, which can control light, acting as a magnetic lens. The potential applications for this kind of device is remarkable, for example the observation of light patterns in ferrofluids motivated some authors: to compare them with some atmospheric optics phenomena [2]; or to understand the cause behind the existence of light patterns [3], known as magnetic contours; or considering the ferrofluids as "smart nanofluid" [4], we can find some interesting studies of the optical properties controlled by an external magnetic field, such as the formation of ring structures of light in scattered patterns [5]; or in some exciting applications such as liquid robotics [6]. In addition to these cases, we have applications of nanoparticles in the medical field, because nanomaterials can offer a way to treat cancer without causing much damage to healthy tissue [7,8].…”