Light questions This is a list of recently added questions about light. Play light quiz and see all the questions. Which color has the greatest albedo?White. Albedo in Latin is simply "whiteness". It is the reflecting power of a surface - the ratio of reflected radiation from the surface to incident radiation upon it.Created by: Paweł Kołodziejczykhard 46% whitewhite2953blueblue979redred1563blackblack799Latin riddles » What is "c" in E=mc^2?Speed of light. In words, energy equals mass multiplied by the speed of light squared.Created by: Paweł Kołodziejczykeasy 71% thermodynamic free energythermodynamic free energy818specific heat capacityspecific heat capacity1033speed of lightspeed of light5923Coulomb, unit of the electric chargeCoulomb, unit of the electric charge465discoverers riddles » What kind of building is that?Solar power plant. In The PS10 Solar Power Plant, 624 movable mirrors concentrate the sun's rays to the top of a 115 meter (377 ft) high, tower where a steam turbine is located. The plant is located near Seville, Spain.Created by: globalquiz.orgaverage 65% superlighthousesuperlighthouse2223solar power plantsolar power plant9261tent-type greenhousetent-type greenhouse1029a fountain in Dubaia fountain in Dubai1726electricity riddles » Which beverage is is fluorescent in UV light?Tonic water is transparent in daylight. Under ultraviolet light, the quinine makes it fluorescent (pictured), even though it is present in a negligible concentration.Created by: Luca Biaggihard 51% SpriteSprite2961milkmilk1769tonic watertonic water6903pineapple juicepineapple juice1647beverages riddles » The rainbow is violet on the inside of its arc. What color is it on the outside?Red. Visible light spans from red to violet. It is easy to remember, since wavelengths just outside the visible range are called infrared and ultraviolet.Created by: Hà Linh Chihard 55% blueblue3080greengreen1770yellowyellow3780redred10876optics riddles » Who should you expect to show stronger red-eye effect?Blue-eyed people. The iris plays no role in the effect, but the blue-eyed people have relatively low melanin in the fundus as well. Therefore, they show a much stronger red-eye effect, as the light passing fundus is not absorbed by melanin. The role of melanin in red-eye effect is nicely demonstrated in case of heterochromia (one eye blue, one brown): typically, only the blue eye displays the effect.Created by: Kantapat Rassameehard 54% blue-eyed peopleblue-eyed people4576brown-eyed peoplebrown-eyed people1358elderselders119there is no differencethere is no difference2369eyes riddles » What photographic technique was used to create this photo?Light painting. The photo was taken with long exposure. For the first 15 seconds, the author hold still with lights on, to achieve the light in background. Later, he switched off the light and wrote his name with light in his hand. He used his nose as a reference point so he could close the "O" letter - which explains the flare at this position.Created by: globalquiz.orgaverage 66% light paintinglight painting15921phototypographyphototypography2088overexposureoverexposure2390painting on the lenspainting on the lens3374photography riddles » How long does it take the sunlight to reach the Earth?8 minutes. The distance from Earth to the Moon is 1.2 light seconds. The distance to the nearest star (Proxima Centauri) is 5.46 years.Created by: Hitter smashereasy 70% 3 seconds3 seconds31391 minute1 minute13858 minutes8 minutes145551 hour1 hour1437Sun riddles » What are the most luminous objects in the universe?Quasars. A quasar is an extremely energetic source of radiation powered by accretion disc around galaxy's central supermassive black hole. Quasars were much more common in the early universe, as all known quasars are extremely distant.Created by: globalquiz.orghard 41% supergiant starssupergiant stars929novaenovae454supernovaesupernovae5550quasarsquasars4979universe riddles » How many typical stars can supernova be luminous as?One hundred billion stars. Supernovae are extremely luminous and often briefly outshine an entire galaxy. No supernova has been observed in the Milky Way since 1604, but they are often observed in distant galaxies.Created by: globalquiz.orghard 51% ten typical starsten typical stars632one thousand typical starsone thousand typical stars1629one million starsone million stars3189one hundred billion starsone hundred billion stars5816stars riddles » Play technology quiz and see all the questions.