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 47% whitewhite1732blueblue541redred920blackblack442Latin 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 energy517specific heat capacityspecific heat capacity650speed of lightspeed of light3670Coulomb, unit of the electric chargeCoulomb, unit of the electric charge278discoverers 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 66% superlighthousesuperlighthouse1606solar power plantsolar power plant6893tent-type greenhousetent-type greenhouse667a fountain in Dubaia fountain in Dubai1204electricity 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 53% SpriteSprite1992milkmilk1355tonic watertonic water5211pineapple juicepineapple juice1186beverages 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% blueblue2220greengreen1234yellowyellow2847redred7750optics 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 57% blue-eyed peopleblue-eyed people3390brown-eyed peoplebrown-eyed people871elderselders90there is no differencethere is no difference1550eyes 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 68% light paintinglight painting9871phototypographyphototypography1272overexposureoverexposure1398painting on the lenspainting on the lens1928photography 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 smasheraverage 69% 3 seconds3 seconds23081 minute1 minute9688 minutes8 minutes101101 hour1 hour1062Sun 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 42% supergiant starssupergiant stars637novaenovae300supernovaesupernovae3381quasarsquasars3177universe 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 53% ten typical starsten typical stars474one thousand typical starsone thousand typical stars1163one million starsone million stars2196one hundred billion starsone hundred billion stars4338stars riddles » Play technology quiz and see all the questions.