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 folks who are receptive 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. Trouble. During a thunderstorm or you see the lightning straight away but we hear the thunder. Thats because some. Waves move slowly whereas 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. Life 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 rays sometimes its even possible for us to see the. Light that does not st
Signing the deal. Toris to the Iran Nuclear Deal trigger a dispute mechanism after steps back from its commitments. Volcanic tremors rock parts of the philippines as calls grow to evacuate up to a 1000000 people. In sport the bushfire crisis affects the australian tennis open one player having to pull out a phone call or find much with breathing problems a smoke lingers over the practice courts in melbourne. Hello we begin with breaking news and Sudanese Security forces have opened fire in the capital hard to. There are believed to be from the now disbanded Operations Units of the general Intelligence Services fighting has broken out over an ultimatum they were given they were told to either retire or join the Rapid Support forces saddams military have deployed special forces to contain the violence lets get an update from her morgan shes joining us on the phone from hard to hit but what are you hearing and seeing with. Ones Irene Alexander center what is happening right now and how do
The when the come out there will be a bloodbath has he thought it through what happens then meanwhile in his speech earlier on friday indias Prime Minister made no mention of kashmir almost there is give our. We belong to a country that has given the world not war but buddhas message of peace and that is the reason why our voice against terrorism to alert the world about this evil rings with seriousness and outrage we believe that this is one of the Biggest Challenges not for any single country but for the entire world and humanity the lack of unanimity among us on the issue of terrorism against those very principles that are the basis of the creation of the u. N. And that is why for the sake of humanity i firmly believe that its absolutely imperative that the world unite against terrorism. Demonstrators in egypt to the gangbang now calling for the resignation of president sisi cafes and shops shot and football matches were perspire and as officials tighten security across the country
My name is matthew goodman, i old the science chair year at csis. Welcome to our online viewers, we always have a good turnout online as well. Welcome to the event, building bridges, question mark, in u. S. China relations. This is brought to us with a kind sponsorship of the Carnegie Corporation of new york which has been a supporter of the dialog that lies behind this event which ill explain in just a second and ill introduce our terrific panel in a second and invite them up. First let me make a couple of administrative announcements. As usual, please silence your phones and if theres any kind of emergency, which is unlikely, weve never had that problem, just follow me. That are emergencies hears and at National Geographic one street down on m street. And i think that is all i need to say administratively. Let me just say that the actual narrow reason for this event is that were going to be rolling out a series, a collection of essays that have been written by u. S. And chinese schol
Chaotic withdrawal from ive gone to sign in 2021. Our question by a house committee. The Great Barrier reef loses its color, the latest mass, bleaching how sciences worried for marine life. The hello. We begin in gaza. Where is really air strikes . Have targeted an area crowded with Residential Homes and buildings. One attack stroke, a family home killing 15 people inside 1st responders are struggling to retrieve more bodies, stuck under the rubble of the zeros and a study for reports from the scene. And some pictures in his report are disturbing the slightly and im to follow up on them and just really rates have not stopped attacking cause a city since the morning was board. Just have targeted a family home at the center of cause a city killing 15 people. These dead bodies were retrieved, moments ago from under the rubble of this house. What were seeing is that the majority killed here are women and children. And this was a direct targeting, but its really were just off on a house of