![]() ![]() All optical phenomena coincide with quantum phenomena. *Citation: "G-band and Hard X-ray Emissions of the 2006 December 14 Flare Observed by Hinode/SOT and RHESSI," by Kyoko Watanabe, Säm Krucker, Hugh Hudson, Toshifumi Shimizu, Satoshi Masuda, Kiyoshi Ichimoto. Optical phenomena are any observable events that result from the interaction of light and matter. ![]() It's possible that as the sun eases into a more active state over the next year, scientists will have more opportunities to study the flares.Ī paper on the new work, with Kyoko Watanabe of Japan Aerospace Exploration Agency as lead author, appeared May 20 in The Astrophysical Journal. "It's being done by electromagnetic effects that are not really understood," Hudson admitted. "As opposed to the LHC where you accelerate a few particles, it would be like accelerating the whole building basically," said Hugh Hudson, also of Berkeley's Space Science Laboratories, who worked with Krucker.Īstronomers haven't figured out how exactly the sun works as a particle accelerator just yet. It's not unlike what humans do at a much, much smaller scale in particle accelerators like the Large Hadron Collider. Hence, the sun looks reddish to us during sunrise and sunset and the full moon has a reddish appearance near the horizon.Now, it looks as if the extremely powerful electromagnetic fields somehow deliver enormous amounts of energy into particles in the sun's photosphere. Most of the blue and colours of other such wavelengths get scattered thus leading to the least scattered light i.e. The Reddish Appearance of the Sun and Full Moon near the Horizonĭuring the times of sunrise or sunset, the light rays have to travel more in the atmospheric air. Hence the clouds having a > λ are generally white. For a > λ, it is not true that all wavelengths are nearly scattered equally. λ is the relative size of the wavelength and the scatterer is of size a. There are various large particles present in the atmosphere like water and dust. Now, violet has a much shorter wavelength than blue and so it scatters the most but why are we not able to see it? Because our eyes are more sensitive to blue colour than violet and hence the sky appears blue to us. It is due to this reason that blue colour dominates the sky above as it has a shorter wavelength, it scatters more. From Snell's law it can be seen that the angle of refraction of light in a prism depends on the refractive index of the prism material. The light having shorter wavelengths is scattered much more than the light having longer wavelengths. The most commonly seen consequence of dispersion in optics is the separation of white light into a color spectrum by a prism. When sunlight enters the earth’s atmosphere and travels, it gets scattered by the particles present in the atmosphere. Refraction at Spherical Surfaces and By Lenses All the remaining colours exist between these two. The red light comes out at an angle of 42 degrees to the sunlight while the violet light comes out at an angle of 40 degrees. As this light moves forward to come out of the droplet, it undergoes refraction again. These rays of light then strike the inner surface of that water droplet leading to reflection if the angle between the refracted ray and normal to the drop surface is greater than the critical angle i.e. The colour having a shorter wavelength of light i.e. The colour having a longer wavelength of light i.e. ![]() In the opposite part of the sky to the sun, it should be rainingĪs the light from the sun enters a water droplet present in the atmosphere, it is refracted. The white light then splits into 7 component colours of the rainbow of different wavelengths.The sun should be shining in a part of the sky.I have query that what will be the rainbow phenomena different in. For a rainbow to be visible, there are two conditions that should be met- Rainbows are formed by the dispersion of light & reflection (not total. 1.46 White light ray from the sun refracts as it enters. 1.45 Ray diagram for two raindrops and person seeing a rainbow. 1.44 Sun, person, cloud, and rain when a person is seeing a rainbow. 1.43 Dispersion of white light into its spectrum of colors. When the water droplets in the atmosphere disperse in the presence of sunlight, the rainbow is visible to us. 1.42 Student’s entry in a table about exploring dispersion phenomena. ![]() It can be seen when a person has his/her back towards the sun. The rainbow with its spectacular 7 colours spread across the sky, is an amazing and most beautiful optical phenomenon. ![]()
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