Staying Focused Lenses are parabolic surfaces that collect light and focus it. The lens in your eye is a parabola. When it is formed correctly, it focuses images on your retina, the area at the back of your eye. If your lens is misshapen, it won't focus images on your retina. Its focal point will either be in front of or behind your retina, and the image on your retina will be blurry. Eye doctors create corrective lenses like eyeglasses and contacts to change the focal point of your eye's lens. By measuring the distortion in your vision, they can calculate how far to move your eye's focal point, and in what direction. Your corrective lenses are made specifically for your eyes, which is why they won't work for other people. Sometimes, a person opts to undergo laser surgery. Then the eye d...
A traveler to the Philippines knows the dance too well. You check into a hotel that advertises Wi-Fi. Turns out it’s only available in the lobby, and only in the daytime. Then you learn of a freak service outage in the lobby. When you do eventually connect, no websites come up. On better days, each website takes a minute or two to load. Yes, on any kind of device. The Philippines is Asia’s outlier for Internet sloth, but why? Occasionally the answer is local. Your host might be afraid of keeping the router going 24 hours, for example. Or the hotel lacks money to extend Wi-Fi coverage to guestrooms. But more common explanations in the Southeast Asian country popular with foreign tourists are linked to economic development pains and awkward relations among providers. Obviously the issue
Samsung profits boosted by smartphone sales Share this with Facebook Share this with Twitter Share this with Messenger Share this with Email Share Image copyrightSAMSUNG Strong smartphone sales have helped Samsung Electronics post its best quarterly results in more than two years. Second-quarter operating profit jumped 18% to 8.1tn Korean won ($7.17bn; £5.46bn), in line with the company's guidance issued in July. Operating profit at its mobile division soared 57% year-on-year to 4.3tn won. That is mainly driven by strong sales of its Galaxy S7 and Galaxy S7 Edge smartphone models. Samsung predicts continued increase in demand for its smartphones and tablets in the second half of the year. But the company also indicated that "mar
Apple announced the third iteration of its smartwatch on September 22, 2017, so we expect we'll have to wait until at least September 2018 to see the launch of the Apple Watch 4. As the Apple Watch 2 was released a year earlier in September 2016, that’s our best guess - but it's quite likely. We could be waiting even longer though as the gap between the original Apple Watch and the Apple Watch 2 was over a year at 17 months. There’s no word on the Apple Watch Series 4's price, but it’s likely to be around the same as the Apple Watch 3 currently is, meaning a starting price of around £329 / $329 / AU$459 for the smaller 38mm version. That said, the Apple Watch 3 actually had a lower launch price than the Apple Watch 2, so with all the extra tech likely to be found in the Apple Watc
The Soviet Union inaugurates the “Space Age” with its launch of Sputnik, the world’s first artificial satellite. The spacecraft, named Sputnik after the Russian word for “satellite,” was launched at 10:29 p.m. Moscow time from the Tyuratam launch base in the Kazakh Republic. Sputnik had a diameter of 22 inches and weighed 184 pounds and circled Earth once every hour and 36 minutes. Traveling at 18,000 miles an hour, its elliptical orbit had an apogee (farthest point from Earth) of 584 miles and a perigee (nearest point) of 143 miles. Visible with binoculars before sunrise or after sunset, Sputniktransmitted radio signals back to Earth strong enough to be picked up by amateur radio operators. Those in the United States with access to such equipment tuned in and listened in awe as the beepin