0_Wizard
hello.. how do you like colours.. i like red , the last to see in the spectrum of light
Red is the colour at the end of the visible spectrum of light, next to orange and opposite violet.
chosen_Red_0
Red
chosen_topic_0_Red
Rainbow
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun. Rainbows can be full circles. However, the observer normally sees only an arc formed by illuminated droplets above the ground, and centered on a line from the sun to the observer's eye. In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.
Blue
Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall scattering explains blue eyes.
Orange (colour)
Orange is the colour between yellow and red on the spectrum of visible light. Human eyes perceive orange when observing light with a dominant wavelength between roughly 585 and 620 nanometres. In painting and traditional colour theory, it is a secondary colour of pigments, created by mixing red and yellow. It is named after the fruit of the same name. The orange colour of carrots, pumpkins, sweet potatoes, oranges, and many other fruits and vegetables comes from carotenes, a type of photosynthetic pigment. These pigments convert the light energy that the plants absorb from the sun into chemical energy for the plants' growth.
Red-tailed hawk
The red-tailed hawk ("Buteo jamaicensis") is a bird of prey that breeds throughout most of North America, from the interior of Alaska and northern Canada to as far south as Panama and the West Indies. It is one of the most common members within the genus of "Buteo" in North America or worldwide. The red-tailed hawk is one of three species colloquially known in the United States as the "chickenhawk," though it rarely preys on standard-sized chickens. The bird is sometimes also referred to as the red-tail for short, when the meaning is clear in context. Red-tailed hawks can acclimate to all the biomes within their range, occurring on the edges of non-ideal habitats such as dense forests and sandy deserts.
Theory of Colours
Theory of Colours (German: "Zur Farbenlehre") is a book by Johann Wolfgang von Goethe about the poet's views on the nature of colours and how these are perceived by humans. It was published in German in 1810 and in English in 1840. The books contains detailed descriptions of phenomena such as coloured shadows, refraction, and chromatic aberration. The work originated in Goethe's occupation with painting and mainly exerted an influence on the arts (Philipp Otto Runge, J. M. W. Turner, the Pre-Raphaelites, Wassily Kandinsky). The book is a successor to two short essays entitled "Contributions to Optics".
Military colours, standards and guidons
In military organizations, the practice of carrying colours, standards or guidons, both to act as a rallying point for troops and to mark the location of the commander, is thought to have originated in Ancient Egypt some 5,000 years ago. The Roman Empire also made battle standards a part of their vast armies. It was formalized in the armies of Europe in the High Middle Ages, with standards being emblazoned with the commander's coat of arms. As armies became trained and adopted set formations, each regiment's ability to keep its formation was potentially critical to its, and therefore its army's, success.
Color vision
Color vision is the ability of an organism or machine to distinguish objects based on the wavelengths (or frequencies) of the light they reflect, emit, or transmit. Colors can be measured and quantified in various ways; indeed, a person's perception of colors is a subjective process whereby the brain responds to the stimuli that are produced when incoming light reacts with the several types of cone cells in the eye. In essence, different people see the same illuminated object or light source in different ways. Isaac Newton discovered that white light, after being split into its component colours when passed through a dispersive prism, could, by passing them through a different prism, be recombined to make white light.
1_Apprentice
I like blue, blue is my favorite color. Red is pretty too!
0_Wizard
yes.. i like blue too .it is pretty attractive as it is at the dominant wave length
The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres.
self_Blue_2
Blue
self_1_Blue
500 kHz
The radio frequency of 500 kilohertz (500 kHz) has been an international calling and distress frequency for Morse code maritime communication since early in the 20th century. The unit "kilohertz" was not introduced until the 1960s. For most of its history, the international distress frequency was referred to by its equivalent wavelength, 600 meters, or, using the earlier frequency unit name, 500 kilocycles (per second) or 500 kc. The United States Coast Guard and comparable agencies of other nations used to maintain 24-hour watches on this frequency, staffed by highly skilled radio operators. Many SOS calls and medical emergencies at sea were handled here until December 1999.
Kalaparru
Kalaparru is a village in West Godavari district of the Indian state of Andhra Pradesh. It is located in Pedapadu mandal of Eluru revenue division. It is located at a distance of 13 km from district headquarters Eluru city. Census of India, Kalaparru had a population of 2987. The total population constitutes 1505 males and 1482 females: a sex ratio of 985 females per 1000 males. 274 children are in the age group of 0–6 years, with a child sex ratio of 1015 girls per 1000 boys. The average literacy rate stands at 77.63%. Kalaparru has two entrances. The main entrance is (west) opposite of NH-5 and another entrance is at the back side of the village.
Evolution of human colour vision
Evolution of human colour vision over time: humans ("homo sapiens") have developed a trichromatic view of the world in comparison to a majority of other mammals that only see the world from a dichromatic view. Early human ancestors are believed to have viewed the world using UV vision as far back as 90 million years ago. It is thought that the shift to trichromatic vision capabilities and the ability to see blue light have evolved as an adaptive trait over time. It is believed that due to a number of environmental factors, ancestral humans lived with limited colour vision. This is believed to have also been influenced by life styles, including being predominantly nocturnal.
Music of the United States
The music of the United States reflects the country's multi-ethnic population through a diverse array of styles. It is a mixture of music influenced by West African, Irish, Scottish and mainland European among others. The country's most internationally renowned genres are jazz, blues, country, bluegrass, rock, rhythm and blues, soul, ragtime, hip hop, barbershop, pop, experimental, techno, house, dance, boogaloo, salsa, and rock and roll. The United States has the world's largest music market with a total retail value of 4,898.3 million dollars in 2014, and its music is heard around the world. Since the beginning of the 20th century, some forms of American popular music have gained a near global audience.
Intracortical encephalogram signal analysis
Intracortical encephalogram signal analysis (minedICE) is the learning and subsequent prediction of electrical activity inside the grey matter of the brain produced by the firing of neurons within the brain. The device was made by clinical researchers and medical Doctors at Columbia University, University of Colorado at Anschutz Medical Campus, and the University of Colorado at Colorado Springs. Intracortical encephalogram signal analysis has two components: 1) an intracortical EEG multicontact electrode (ICE) that inserted through a patient's skull and deep into the grey matter of the patient, and 2) an artificial intelligent agent that is trained in neurological signal analysis.
American popular music
American popular music has had a profound effect on music across the world. The country has seen the rise of popular styles that have had a significant influence on global culture, including ragtime, blues, jazz, swing, rock, bluegrass, country, R&B, doo wop, gospel, soul, funk, heavy metal, punk, disco, house, techno, salsa, grunge and hip hop. In addition, the American music industry is quite diverse, supporting a number of regional styles such as zydeco, klezmer and slack-key. Distinctive styles of American popular music emerged early in the 19th century, and in the 20th century the American music industry developed a series of new forms of music, using elements of blues and other genres of American folk music.
Wind wave
In fluid dynamics, wind waves, or wind-generated waves, are surface waves that occur on the free surface of bodies of water (like oceans, seas, lakes, rivers, canals, puddles or ponds). They result from the wind blowing over an area of fluid surface. Waves in the oceans can travel thousands of miles before reaching land. Wind waves on Earth range in size from small ripples, to waves over high. When directly generated and affected by local winds, a wind wave system is called a wind sea. After the wind ceases to blow, wind waves are called swells. More generally, a swell consists of wind-generated waves that are not significantly affected by the local wind at that time.
1_Apprentice
what does dominant wave length mean?