Free Essays on Youngs Two-slit Experiment

The two-slit experiment had, and still preserves a fundamental impact on modern physics. In his Lectures on Physics, Feynman stated that the interference patterns seen in Young’s experiment are â€Å"a phenomenon which is impossible, absolutely impossible to explain in any classical way, and which has in it the heart of quantum mechanics. In reality it contains the only mystery.† [1] Here, he is expressing the wonder of wave-particle duality, in which matter at an atomic level behaves at times like a particle and at others, like a wave. However, observations of both qualities at the same time are impermissible for some reason by the laws of quantum mechanics. Within the two-slit experiment, there are numerous aspects that defy logic and maintain the mystery that is quantum physics. The experiment itself works by emitting photons of light from a monochromatic source to pass through a single slit to obtain a narrow beam of light. This narrow beam is then allowed to fall on a screen containing two narrow slits. Light from the two slits then falls on a distant screen. The resulting patterns of light on the screen can then be observed. What Young found was that a central bright maximum of light was obtained, and around this central bright maximum were equidistant striations of light and dark. To clarify one point, it was later discovered that if a single photon were fired at the two slits, an interference pattern would not appear. Rather, a single 'blip' would appear on the screen, which indicates that the photon is not a wave, but rather a particle. If a large number of photons were fired at the slits, an interference pattern would begin to a ppear. So it seems that photons are really particles that behave collectively like waves. The same reasoning applies to all particles, not just photons. Many variations of the Young two-slit experiment have since arisen, namely gedankens (thought experiments), to illustrate the fundamental princi... Free Essays on Young's Two-slit Experiment Free Essays on Young's Two-slit Experiment The two-slit experiment had, and still preserves a fundamental impact on modern physics. In his Lectures on Physics, Feynman stated that the interference patterns seen in Young’s experiment are â€Å"a phenomenon which is impossible, absolutely impossible to explain in any classical way, and which has in it the heart of quantum mechanics. In reality it contains the only mystery.† [1] Here, he is expressing the wonder of wave-particle duality, in which matter at an atomic level behaves at times like a particle and at others, like a wave. However, observations of both qualities at the same time are impermissible for some reason by the laws of quantum mechanics. Within the two-slit experiment, there are numerous aspects that defy logic and maintain the mystery that is quantum physics. The experiment itself works by emitting photons of light from a monochromatic source to pass through a single slit to obtain a narrow beam of light. This narrow beam is then allowed to fall on a screen containing two narrow slits. Light from the two slits then falls on a distant screen. The resulting patterns of light on the screen can then be observed. What Young found was that a central bright maximum of light was obtained, and around this central bright maximum were equidistant striations of light and dark. To clarify one point, it was later discovered that if a single photon were fired at the two slits, an interference pattern would not appear. Rather, a single 'blip' would appear on the screen, which indicates that the photon is not a wave, but rather a particle. If a large number of photons were fired at the slits, an interference pattern would begin to a ppear. So it seems that photons are really particles that behave collectively like waves. The same reasoning applies to all particles, not just photons. Many variations of the Young two-slit experiment have since arisen, namely gedankens (thought experiments), to illustrate the fundamental princi...

How to Land an Executive Position With Expert Wendy Enelow

How to Land an Executive Position With Expert Wendy Enelow Wendy Enelow is an expert on finding, and keeping, a job. Whether shes showing us how to get the perfect resume at Resume Writing Academy or leading thinkers on the cutting edge of recruiting and hiring at Career Thought Leaders, you wont find anyone whos more focused on careers. Wendy talked with us about finding an executive role in the modern day.When someone is looking to step into an executive role, whats the first thing they should do?Determine whether or not they have the requisite skills, qualifications and credentials for the positions they are targeting. If not, they should determine the best place to acquire those skills either through employment or an educational program. No need to apply if youre not yet qualified. Equally important is finding an executive mentor or sponsor who can work with you to promote your candidacy to the company and/or position that youre targeting.How does finding an executive role differ from finding another job?Savvy executives who are seeking new opportunities should engage in high-level job search activities, including online networking, in-person networking, blogging, target company outreach, recruiter outreach and direct mail/email. They might also respond to specific online job postings, although that should not be the crux of their search campaign, as its the least effective way to find a new position. Most other job seekers should engage in as many of these activities as are relevant to their career objectives. Perhaps the most significant difference is that executive job searches generally take longer since there are less positions available, the competition can be fierce and the hiring process itself takes a great deal of time.If an employer needs to fill an executive position, where should they start looking?Some employers will reach out to executive recruiters to handle the task of recruiting new management and leadership. Although the price tag is high, recruiters will find the candidates of choice and presen t them to the company. Alternative strategies, which can be just as effective and much less costly, include using LinkedIn to identify and connect with qualified candidates, searching groups of interest to the companys industry or profession to find group members with the qualifications the hiring company is seeking, creating a Facebook page and Twitter account to attract quality candidates to the company, and networking with company personnel, suppliers, business partners and others who know the people that they may want to hire.How important is the resume to finding an executive position, and why?The resume is any professionals calling card, giving enough important information and sharing the right achievements and success stories to entice the hiring company to invite the candidate for an interview. Just as important in todays world of online job search is the LinkedIn profile. In fact, LinkedIn can be more important when a company is doing their initial sourcing; then, the resum e comes into play after the candidate has been identified on LinkedIn, which is the primary social media platform for executives.What do you wish everyone knew about writing a resume?The most important thing to know about resume writing is that youre writing to the futureto the position and industry that youre targeting. Resumes are NOT autobiographical essays of everything youve done throughout your entire career. Rather, theyre career marketing communications designed to sell your distinctive qualifications, experiences, achievements, educational credentials and more. Resumes are the appetizers; candidates are the main course (once they get an interview)!What trends in executive hiring should we be watching for in the future?Perhaps the greatest trend will be in the specificity of expertise. Companies want to hire executives with very specific expertise in their industry, product or technology executives who can solve problems and overcome challenges, executives who can optimize opportunities and deliver results by leveraging what theyve already accomplished and who they know. And companies want virtually immediate results. They dont want the plan that will turnaround the business in two years; they want the turnaround now.