Diode Laser Quotes

Marvin stood there. ‘Out of my way little robot,’ growled the tank. ‘I’m afraid,’ said Marvin, ‘that I’ve been left here to stop you.’ The probe extended again for a quick recheck. It withdrew again. ‘You? Stop me?’ roared the tank, ‘Go on!’ ‘No, really I have,’ said Marvin simply. ‘What are you armed with?’ roared the tank in disbelief. ‘Guess,’ said Marvin. The tank’s engines rumbled, its gears ground. Molecule-sized electronic relays deep in its micro-brain flipped backwards and forwards in consternation. ‘Guess?’ said the tank. ‘Yes, go on,’ said Marvin to the huge battle machine, ‘you’ll never guess.’ ‘Errrmmm …’ said the machine, vibrating with unaccustomed thought, ‘laser beams?’ Marvin shook his head solemnly. ‘No,’ muttered the machine in its deep gutteral rumble, ‘Too obvious. Anti-matter ray?’ it hazarded. ‘Far too obvious,’ admonished Marvin. ‘Yes,’ grumbled the machine, somewhat abashed, ‘Er … how about an electron ram?’ This was new to Marvin. ‘What’s that?’ he said. ‘One of these,’ said the machine with enthusiasm. From its turret emerged a sharp prong which spat a single lethal blaze of light. Behind Marvin a wall roared and collapsed as a heap of dust. The dust billowed briefly, then settled. ‘No,’ said Marvin, ‘not one of those.’ ‘Good though, isn’t it?’ ‘Very good,’ agreed Marvin. ‘I know,’ said the Frogstar battle machine, after another moment’s consideration, ‘you must have one of those new Xanthic Re-Structron Destabilized Zenon Emitters!’ 'Nice, aren’t they?’ agreed Marvin. ‘That’s what you’ve got?’ said the machine in condiderable awe. ‘No,’ said Marvin. ‘Oh,’ said the machine, disappointed, ‘then it must be …’ ‘You’re thinking along the wrong lines,’ said Marvin, ‘You’re failing to take into account something fairly basic in the relationship between men and robots.’ ‘Er, I know,’ said the battle machine, 'is it … ’ it tailed off into thought again. ‘Just think,’ urged Marvin, ‘they left me, an ordinary, menial robot, to stop you, a gigantic heavy-duty battle machine, whilst they ran off to save themselves. What do you think they would leave me with?’ ‘Oooh er,’ muttered the machine in alarm, ‘something pretty damn devastating I should expect.’ ‘Expect!’ said Marvin. ‘Oh yes, expect. I’ll tell you what they gave me to protect myself with shall I?’ ‘Yes, alright,’ said the battle machine, bracing itself. ‘Nothing,’ said Marvin. There was a dangerous pause. 'Nothing?’ roared the battle machine. ‘Nothing at all,’ intoned Marvin dismally, ‘not an electronic sausage.’ The machine heaved about with fury. ‘Well doesn’t that just take the biscuit!’ it roared, ‘Nothing, eh?’ Just don’t think, do they?’ ‘And me,’ said Marvin in a soft low voice, ‘with this terrible pain in all the diodes down my left side.’ ‘Makes you spit, doesn’t it?’ ‘Yes,’ agreed Marvin with feeling. ‘Hell that makes me angry,’ bellowed the machine, ‘think I’ll smash that wall down!’ The electron ram stabbed out another searing blaze of light and took out the wall next to the machine. ‘How do you think I feel?’ said Marvin bitterly. ‘Just ran off and left you did they?’ the Machine thundered. ‘Yes,’ said Marvin. ‘I think I’ll shoot down their bloody ceiling as well!’ raged the tank. It took out the ceiling of the bridge. ‘That’s very impressive,’ murmured Marvin. ‘You ain’t seen nothing yet,’ promised the machine, ‘I can take out this floor too, no trouble!’ It took out the floor too. ‘Hells bells!’ the machine roared as it plummeted fifteen storeys and smashed itself to bits on the ground below. ‘What a depressingly stupid machine,’ said Marvin and trudged away.

The notion that electromagnetic energy exists as discrete packets of energy rather than a continuous stream became the foundation on which physicists erected what is inarguably the most successful (and strangest) theory in the history of science. The laws of quantum physics not only replicate all the successes of the classical theory they supplanted (that is, a quantum calculation produces an answer at least as accurate as a classical one in problems ranging from the fall of an apple to the flight of a spaceship). They also succeed where the laws of classical physics fail. It is quantum physics, not classical physics, that explains the burning of stars, accounts for the structure of elementary particles, predicts the order of elements in the periodic table, and describes the physics of the newborn universe. Although devised to explain atomic and electromagnetic phenomena, quantum physics has “yielded a deep understanding of chemistry and the solid state,” noted the physicist Daniel Greenberger, a leading quantum theorist: quantum physics spawned quantum technologies, including transistors, lasers, semiconductors, light-emitting diodes, scans, PET scans, and MRI machines.

Don’t know if you have any hobbies.” She nodded. “I do. I may have to take a break from it for a bit while I’m out here, but normally when I have a light day on campus, I go to a class . . .” I waited. “It’s . . . pole dancing.” I stopped breathing, but at least I didn’t choke. Nodding, I took a sip of my wine to block my face, which I was pretty sure had turned the shade of a beet. “So, like Flashdance? Welder by day, dancer by night?” I barked out, feeling a stirring in my pants that was wholly inappropriate for my roomie, who’d been talking about diode lasers a minute earlier. She’s a goddamn pole dancer. She chuckled and crossed her arms over her chest as though trying to keep me from picturing her dancing. “Excellent movie reference. But no, that’s not even close to what I do.” It hardly mattered. My brain was stuck. Like a white-hot strobe had blinded me to everything except Sarah wearing lingerie and grinding on a pole under hot lights. For me. Stop picturing it. Fuck! “Cool,” I finally managed to say with a straight face. Like it meant nothing. She nodded. Like it meant nothing. Then she spread some brie cheese on a cracker and took a bite. I choked out an excuse and went to the bathroom to get a grip. This will be okay. It will. It has to be. In the bathroom, I splashed some cold water on my face and took a hard look at myself in the mirror. What was happening? I hadn’t been this jacked up over a woman anytime in the past two years. My emotions had been buried in caverns so deep I felt confident they were gone for good. I was fine with that. It made no sense. Or . . . maybe it did. I’ve always been competitive as fuck. If I’m told I can’t have something, I want it all the more and do anything in my power to make it mine. That had to be what was happening here. It was all in my head. I knew she was off limits, so the competitive motherfucker in me started bucking against that. I just needed to get my head together and think of her like any other human who happened to be using my second bedroom. When I got back to the table, Sarah looked up at me with a thin slice of Parma ham twirled around her fork and put the bit into her mouth. I had no defensible reason to focus on her lips or the soft contour of her jaw while she chewed. She swallowed and smiled at me. “I figured I should get a head start on eating while you were gone. In case you had more questions.” “Good plan. Maybe we should focus on the food for a few minutes, or we could be here all night.” I bit into a slider and closed my eyes at how delicious the slow-roasted meat tasted on the brioche bun. Who needed to cook when someone else could make food that tasted like this? It was how I’d become addicted to takeout and why I rarely ate at home anymore. That, and I spent a lot of time at work. Sarah finished the last of the cheesy bread and wiped her lips gingerly on a napkin before looking right at me with those gorgeous eyes. “This is weird, right? It’s not just me?” I tilted my head, trying to read her expression and decipher her meaning. “Could you be specific? She waved her hands between us. “This. Us. We’re in our thirties and we’re roommates. I don’t know about you, but I haven’t had a roommate for about ten years. Does it freak you out a little bit?” Yes, but not for the reasons she meant.

The message left Kiel at a speed of 300,000 kilometres per second. The sequence of words keyed into Erwin Suess’s laptop at the Geomar Centre entered the net in digital form. Converted by laser diodes into optical pulses, the information raced along with a wavelength of 1.5 thousandths of a millimetre, shooting down a transparent fibreoptic cable with millions of phone conversations and packets of data. The fibres bundled the stream of light until it was no thicker than two hairs, while total internal reflection stopped it escaping. Whizzing towards the coast, the waves surged along the overland cable, speeding through amplifiers every fifty kilometres until the fibres vanished into the sea, protected by copper casing and thick rubber tubing, and strengthened by powerful wires. The underwater cable was as thick as a muscular forearm. It stretched out across the shelf, buried in the seabed to protect it from anchors and fishing-boats. TAT 14, as it was officially known, was a transatlantic cable linking Europe to the States. Its capacity was higher than that of almost any other cable in the world. There were dozens of such cables in the North Atlantic alone. Hundreds of thousands of kilometres of optical fibre extended across the planet, making up the backbone of the information age. Three-quarters of their capacity was devoted to the World Wide Web. Project Oxygen linked 175 countries in a kind of global super Internet. Another system bundled eight optical fibres to give a transmission capacity of 3.2 terabits per second, the equivalent of 48 million simultaneous phone conversations. The delicate glass fibres on the ocean bed had long since supplanted satellite technology.

There is an affordable laser treatment device that can be used at home with a headset that emits near infrared light through diodes placed on the scalp and inside the nostril called Vielight. They are conducting a clinical trial with 228 participants across North America to see what it does for Alzheimer’s. If someone I love was suffering from Alzheimer’s right now, I wouldn’t want to have to wait for this trial to be over before getting the device. The risk of allowing Alzheimer’s to progress is much higher than the risk of trying it out. Devices that use light on the brain range from $200 to many thousands of dollars.

least in a few cases - even things like using light emitting diode therapy (LEDT) or low-level laser therapy (LLLT), as it is also called, are much higher on the ‘things that really work’-list.”367