Unlike morse code <\/em>which uses short and long tones to represent letters, barcodes use wide and narrow printed bars to represent the unique number sequence assigned to a particular item. These barcodes can be scanned by a laser or LED to track everything from can foods to books. Light projected onto a universal product code (UPC) <\/em>or international article number (<\/em>formerly EAN) <\/em>will reflect less from the black bars than from the white spaces onto a photodiode serving as a detector in which the unique pattern is matched with the particular product. It\u2019s this technology that is used in obstacle detection.<\/p>\n Light is immensely helpful in diagnosing and treating cancer. Sophisticated imaging techniques are essential for early detection. X-ray based systems including computerized tomography (CT) scanners utilize photons to noninvasively image structures inside the body. Endoscopes use light transmitted through a fiber to illuminate interior parts of body. The generated image is sent to a detection system to be analyzed. Imaging techniques based on multispectral light scattering in tissue have proven to be an effective detection method.<\/p>\n Unnamed aerial vehicles (UAVs), or drones have a wide range of civilian, law enforcement and military applications. They are useful in climatology research, environmental studies, mineral-oil-gas exploration, border security, disaster relief search and rescue, ocean mapping and in news and information gathering. Optical based systems onboard drones can provide images from overhead as well as that of land surface and underwater vantage points. Advance of scientific imaging helps in taking valuable decisions regarding construction, exploration and realization. Add-on components are making the device more accurate and ready to face practical situations.<\/p>\n Related: The Future of Drones – Uncertain or Promising?<\/a><\/span><\/p>\n Wearable tech is poised to witness the next revolution, on the lines of the smartphone revolution we witnessed the previous decade. Gadgets like Google Glass, fitness bands and smartwatches make this unique combination possible with the help of photonics. Scientifically speaking, these are not just for fashion, but it provides functionality well beyond a common man\u2019s imagination. For example a fitness band can shine different colors of light on the user\u2019s skin allowing sensors to detect the change in blood flow at the microvascular level to measure the blood pressure accurately, which can then be sent in seconds to your doctor\u2019s computer. And Google Glass? I’m not even going to start on that one.<\/p>\n Also Read: How smart will smartwatches get?<\/a><\/span><\/p>\n Simply presenting a 2D image with a 3D view, the fascinating magic cards or seals we get with chocolate or chips packet or those we see in books or canned foods as mark of authorization are applications of holography. Laser light is mostly used as the monochromatic, long range coherent light source, which is used to generate the holograms which contain certain information within the interference pattern created by the light beams. This data provides information about the 3D object when it is reconstructed by a suitable source of light. Holograms are extensively used for military purposes due to its ability to send encrypted messages.<\/p>\n Related: Holographic Digital Data Storage: A Fad or Here to Stay?<\/a><\/span><\/p>\n We’d still be stuck somewhere in the middle ages if it weren’t for the internet. The far reaching effects of the internet are almost impossible to quantify – it acts as a support industry for so many, many other industries, and is undeniably the single biggest contributor to the world’s economy as of today.<\/p>\n And the internet is based, and runs on our exploitation of the physics behind light.<\/p>\n![\"Yaabot_aircraftsafety\"](\"https:\/\/yaabot.com\/wp-content\/uploads\/2015\/11\/Yaabot_aircraftsafety.jpg\")
<\/a><\/p>\nBarcode and scanners<\/h2>\n
<\/a> <\/strong><\/p>\nCancer Diagnosis and Therapy<\/h2>\n
<\/a><\/p>\nDrones<\/h2>\n
<\/a><\/p>\nWearable Technology<\/h2>\n
<\/a><\/p>\nHolography<\/h2>\n
<\/a><\/p>\nInternet<\/h2>\n