Experiments showed that, in fact, facial vision is nothing to do with touch or the front of the face, although the sensation may be referred to the front of the face, like the referred pain in a phantom limb.The sensation of facial vision, it turns out, really goes in through the ears.īlind people, without even being aware of the fact, are actually using echoes of their own footsteps and of other sounds, to sense the presence of obstacles. One report tells of a totally blind boy who could ride his tricycle at good speed round the block near his home, using facial vision. It has been given the name 'facial vision’, because blind people have reported that it feels a bit like the sense of touch, on the face. What else might the engineer think of? Well, blind humans sometimes seem to have an uncanny sense of obstacles in their path. In any event, whether or not the reason is the energy expense, it seems to be the case that, with the possible exception of some weird deep-sea fish, no animal apart from man uses manufactured light to find its way about. The light source must therefore be immensely brighter if it is to be used as a headlight to illuminate the path, than if it is to be used as a signal to others. However using light to find one's own way around requires vastly more energy, since the eyes have to detect the tiny fraction of the light that bounces off each part of the scene. Fireflies and some fish (usually with the help of bacteria) have the power to manufacture their own light, but the process seems to consume a large amount of energy. Fireflies use their light for attracting mates.This doesn't require a prohibitive amount of energy: a male’s tiny pinprick of light can be seen by a female from some distance on a dark night, since her eyes are exposed directly to the light source itself. Given the questions of how to manoeuvre in the dark, what solutions might an engineer consider? The first one that might occur to him is to manufacture light, to use a lantern or a searchlight. Plenty of other modern animals make their living in conditions where seeing is difficult or impossible. Fish and dolphins that live in extremely muddy water cannot see because, although there is light, it is obstructed and scattered by the dirt in the water. Deep-sea fish and whales have little or no light by day or by night. Obviously the night-flying insects that they prey on must find their way about somehow. Bats are not the only creatures to face this difficulty today. Only after the mysterious mass extinction of the dinosaurs about 65 million years ago were our ancestors able to emerge into the daylight in any substantial numbers.īats have an engineering problem: how to find their way and find their prey in the absence of light. In the time when the dinosaurs dominated the daytime economy, our mammalian ancestors probably only managed to survive at all because they found ways of scraping a living at night. It is probable that the nocturnal trades go way back in the ancestry of all mammals. Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade. But the daytime economy is already heavily exploited by other creatures such as birds. You might say that this is a problem of their own making, one that they could avoid simply by changing their habits and hunting by day. What is the definition of Illuminate.ĭefinition of Illuminate is make lighter or brighter.Bats have a problem: how to find their way around in the dark.They hunt at night, and cannot use light to help them find prey and avoid obstacles. Synonym of Illuminate is Beam, clarify, Clear, clear up, commentate, commentate on, comment on, comment upon, crystalise, crystalize, crystallise, crystallize, demystify, edify, elucidate, enlighten, Explain, expound, give light, illume, illumine, illustrate, Inform, irradiate, Light, Lighten, light up, ma. Illuminate meaning in Urdu is روشن کرنا - roshan karn a. Unlock the essence of "Illuminate meaning in Urdu" with our comprehensive exploration and don't hesitate to search for other words and their meanings using this reliable resource. It's a convenient tool for expanding your vocabulary. This reliable online English to Urdu dictionary offers synonyms and multiple meanings of each word. Illuminate meaning is accurately described in both English and Urdu here. Illuminate meaning in urdu is روشن کرنا - roshan karn a, it is a english word used in various contexts. Illuminate Meaning With Definition in Urdu
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