Chapter 1 Introduction to D.R.D.O 1.1 Defence Research and Development Organization DRDO was formed in 1958 from the amalgamation of the already functioning Technical Development Establishment (TDEs) of the Indian Army and the Directorate of Technical Development & Production (DTDP) with the Defense Science Organization (DSO). DRDO is 50 labs strong and is deeply engaged in developing Defense technologies covering disciplines like aeronautics‚ armaments‚ electronics‚ combat vehicles‚ engineering
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expand to its features. The earliest smart phones let users access email‚ and use the phone as a fax machine‚ pager‚ and address book. (insite.artinstitute.edu) These electromagnetic waves are made up of two parts. The first part is an electric field. The second part is a magnetic field. So that is why they are called electromagnetic waves. The two fields are at right angles to each other. (www.scribd.com) Nowadays‚ mobile phones have been part of people’s life. Some are having a hard time without
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their family. Many teenagers who use the computers don’t seem realize that sitting in front of the computer is harmful at all. The electromagnetic waves from the computer-screen make our brain cells get stiffen every second. Human eyes can also lose its focus and get dehydrated easily because the ELF‚ VLF‚ RF and MICROWAVE (types of injurious electromagnetic waves). These harmful waves can cause headache‚ drop in eyesight‚ a brain tumor and leucosis in the worst case. Moreover‚ sitting in
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In Bernard Williams’s article “Induction”‚ he introduced several versions of the induction problem‚ including Hume’s original statement of the problem and Goodman’s “new riddle” of induction. In this essay‚ I will explore the differences and similarities between these two versions of the problem of induction. Both Hume and Goodman seek to address the uncertainty human face while trying to predict the future or making a generalization statement‚ given our limited knowledge. Hume approached via the
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Network users and even network architects are not always aware that at certain fragments of the network path‚ information is not being transmitted through wires. Instead‚ it is propagated through the Earth’s atmosphere or space in the form of electromagnetic waves. This might happen when a computer network leases a channel from a communications carrier and the specific link of such a channel is a satellite or terrestrial microwave link. Reference: COMPUTER NETWORKS principles‚ technologies and
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Excited State- a stationary state of higher energy than the lowest stationary state or ground state of a particle or system of particles. 5. A spectroscope is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum‚ typically used in spectroscopic analysis to identify materials. The variable measured is most often the light’s intensity but could also‚ for instance‚ be
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THE NEW RIDDLE OF INDUCTION I . The Old Problem of Induction Goodman examines how matters stand with respect to the problem of induction. Before going into new problems regarding induction‚ he elaborates on the old problem of induction. The old problem of Induction is the matter of justification. To justify induction a statement should show that it leads to true conclusions from true premises. David Hume pointed out a huge problem with this. As a result‚ Hume argued that specific instances based
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------------------------------------------------- Anechoic chamber An anechoic chamber (an-echoic meaning non-echoing or echo-free) is a room designed to stop reflections of either sound or electromagnetic waves. They are also insulated from exterior sources of noise. The combination of both aspects means they simulate a quiet open-space of infinite dimension‚ which is useful when exterior influences would otherwise give false results. Anechoic chambers were originally used in the context of acoustics (sound
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Waves Assignment Microwave Ovens Microwave ovens‚ or microwaves‚ are kitchen appliances which use microwave radiation to cook‚ heat or defrost food. Properties of a microwave: Microwaves are electromagnetic waves with wavelengths longer than those of Terahertz (THz) wavelengths‚ but relatively short for radio waves. Microwaves have wavelengths approximately in the range of 30 cm (frequency = 1 GHz) to 1 mm (300 GHz). The word microwave generally refers to "alternating current signals with
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volts. Vary the wavelength of the light source (from Infra Red to Ultra Violet) until electrons just begin to be ejected from the sodium surface. State the wavelength and note the speed of the electrons. What is the corresponding frequency of the electromagnetic wave? Why is it called threshold frequency? 2. Repeat the instruction 1 above but allow the light to shine on the metal for a longer time before the wavelength is varied. Is your finding different as found in 1? Justify your finding.
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