Overcomes space and time. Alike based internet. And the effects of city lights on nature. But lets start at the beginning with how we see light. When light enters our eye it hits the retina. And is received by photo receptor cells the socalled rot cells respond to light and dark the cones are responsible for color vision but we only see the light that actually and his our eyes if he were in zambia wanted to know more. Light travel. During a thunderstorm or a soup. Lightning straight away but we hear the thunder with a delay. Thats because sound waves move slowly or as light travels super fast at 300000 kilometers per 2nd. It maintains that speed in space where theres a vacuum and it moves only slightly slower through the earths atmosphere but other media slow it down for example water in which it travels at a mere 225000 kilometers a 2nd. Light travels like ripples spreading on the surface of a liquid in all directions simultaneously. And in Straight Lines which is why we talk of light
Overcome space and time. And like based internet. And the effects of city lights on nature. But lets start at the beginning with how we see light. When light enters our eye it hits the retina. And is received by photo receptor cells the socalled rot cells respond to light and dark the cones are responsible for color vision but we only see the light that actually enters our eyes if you are in zambia wanted to know more. Light travel. During a thunderstorm or you see them. Lightning straight away but we hear the thunder with a delay. Thats because sound waves move slowly or as light travels super fast at 300000 kilometers per 2nd. It maintains that speed in space where theres a vacuum and it moves only slightly slower through the earths atmosphere but other media slow down for example water in which it travels at a mere 225000 kilometers a 2nd. Light travels like ripples spreading on the surface of a liquid in all directions simultaneously. And in Straight Lines which is why we talk of l
Thousands from the. Russian and syrian warplanes have resumed attacks on it led syrias last remaining rebel held province at least 21 people have been killed in recent days thats despite a cease fire that was supposed to have started on sunday but what helmets rescue group has recorded more than a dozen violations of the truce. Reports. The damage caused by one of several airstrikes in the Northwest Province of a planet survivors trying to salvage whats left. Emergency crews combed the rubble to recover the body of a child. Not the other civilians were among the casualties in it with city. Is that of a did it give us your point that. Afternoon it lip says he was targeted by stroke or 23 jets they hit the Industrial Area and alcohol markets must of those hurt have serious injuries. In a nearby hospital friends console a father grieving his son was a ceasefire which started on sunday was shattered on a one step below 6 i was in syrian and russian jets attacked it that city as well as sev
And i got the memo on what to wear today. I love it. Anybody else in bright pink . We have got a few more. It is good to see you all. Im so glad to have this chance to be with you and so glad that i brought family with me. I have my son, alex. Where are you . There he is. The guy in the blue shirt. [applause] sen. Warren just so you know, alex has been my tech support since second grade. [laughter] sen. Warren its true. He now runs his own small business, but he has picked up a new sideline. The new sideline is called support your mother when she runs for president of the United States. [laughter] sen. Warren thank you, alex. [applause] sen. Warren so i thought what we would do today is that i tell you just a little bit about myself, a little bit about why im in this race. I will try to do that as quick as i can. Then we will take as many questions as possible so that i am covering the things most important to you. Then we will engage in that most important part of democracy, selfies.
Nine to five for service and devotion hello, manchester. You can see judy and i got the memo on what to wear today. I love it. Anybody else in bright pink . We got a few more, yeah. Its good to see you all here. Im so glad to have this chance to be with you. And so glad in fact that i brought family with me. I have my son alex, where are you, son . There he is. Where . Guy in the blue shirt. [ applause ] now, just so you know, alex has been my tech support since second grade. Its true. Its true. And he now runs his own small business. But hes picked up a new sideline. And the new sideline is called support your mother when she runs for president of the United States. Thank you, alex. [ applause ] so i thought what we would do today is that i tell you just a little bit about myself, a little bit about why im in this race. Ill try to do that as quick as i can. Then well take as many questions as possible so that i am covering the things most important to you. And then we will engage in t