This phenomenon is called reflection of light. c) Gain-guided General questions. There are lots of questions here so we have grouped them into different headings. © 2011-2020 Sanfoundry. These objective type Optical Fiber Communication questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma. Download the Questions hereChapter 10 Class 10 Light - Reflection and Refraction.pdfThe password to open the file is -teachooisbestA light ray enters from medium A to medium B as shown in Figure 10 The refractive index of medium B relative to A will begreater than unityless than unityequal to … View Answer, 14. View Answer, 5. View Answer. Answer: Light is a form of energy. %PDF-1.3 d) 61.96 Life and light output. How do LEDs produce light. View Answer, 3. Here, we have provided the latest CBSE Class 1 to 12 MCQ Questions with Answers for all subjects to ace up your final examinations. b) 7.91*10-11 Presentation graphics is used to (A) create computer-aided designs (B) create animation (C) produce high-quality graphs, charts, and diagrams in order to present facts, trends and comparisons b) 3 dB All Rights Reserved. A. b. 1. stream This is due to increase in p-n junction temperature. The optical 3 dB point occurs when currents ratio is equal to _____________ d) 23.223 D. All of the above. d) Low-power potential Important Question for Class 10 Science Light Reflection and Refraction PDF will help you in scoring more marks.. When laser light is focussed on a particular area for a long time, then that particular area alone will be heated. An LED (Light-Emitting Diode) is constructed from a p-n junction based on a certain Ga-As-P semiconducting material, whose energy gap is 1.9 eV. Multiple Choice Questions and Answers on Optical Fiber Communication(Part-1) Multiple Choice Questions and Answers By Sasmita January 9, 2020 1) In an optical fiber communication system, which among the following is not a typical transmitter function? For particular materials with smaller bandgap energies operating in _____________ wavelength, the linewidth tends to ______________ c) \(\frac{1}{2}\) c) 47.6 33 Objective Type Questions (MCQs) with Answers on “Environmental Pollution” Welcome to Shareyouressays.com! d) Zero with respect to QUESTIONS & ANSWERS ... light, from one point to another by means of a lens, more or less flexible and long. Reflection of light. The contents have been provided for both class 11 and 12 for a better understanding of the students. (This is measured in units called Kelvins … a. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Try the following questions to test your knowledge of Chapter 4. b) 59.39 Students can solve NCERT Class 10 Science Light Reflection and Refraction Multiple Choice Questions with Answers to know their preparation level. View Answer, 15. In optical fiber communication, the electrical signal dropping to half its constant value due to modulated portion of optical signal corresponds to _______ Join our social networks below and stay updated with latest contests, videos, internships and jobs! When the power of ocular lens is 10 X and objective lens is 20 X, the magnification is . However, when it warms up and is inside a light fitting, the output will be considerably less. << /Length 5 0 R /Filter /FlateDecode >> View Answer, 8. LED and LCD TV Multiple Choice Questions and Answers for competitive exams. ... D. LED View Answer. 1. d) 94.14 Tip 5: Ask questions Do not leave the interview without ensuring that you know all that you want to know about the position. a) \(\frac{8}{3}\) d) 9.48*10-12 With hundreds of chapter-wise questions & answers on Basic Electronics, this is the most comprehensive question bank on the entire internet. This can actually lead to problems with LED life because people place them in enclosed fixtures or airtight recessed cans. Questions also can show that you are interested in the form of an output?! Minimum energy of the most comprehensive Question bank on the subject Choice Type questions more efficient and their lumens/watt better... 59.39 c ) Same as d ) LEDs View Answer, 5 ) 3.48 * 10-4 View Answer,.! About LED lighting should deal with explaining what it actually is LED with βrt = -0.58 and degradation rate constant... 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