12 Aug 2018

GRE Vs GMAT - A Comparison of GRE and GMAT - Is GRE better than GMAT !!!

Here we will provide you the comparison between GRE (Graduate Record Examinations) and GMAT (Graduate Management Admission Test). So let's analyse-


Why GRE or GMAT ?

GRE- Most graduate schools and many business schools require GRE score
GMAT- The test is necessary for admission to most business schools


GRE vs GMAT, Why GRE, WHY GMAT, GRE or GMAT, GRE cost, GMAT cost


Test Structure of GRE and GMAT

GRE Exam Pattern
*A 60 minutes Analytical Writing section having 2 essays of 30 minutes each.  
*Two 35 minutes Quantitative Reasoning sections
*A 30-35 minutes experimental section that can be either math or verbal
 *It also contains two 30-minutes Verbal Reasoning sections 
GMAT Exam Pattern
*A 30 minutes Analytic section with one essay
*A 30 minutes Integrated Reasoning section
*75 minutes Verbal section.
*75 minutes Quantitative section 

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GRE Exam Pattern and Syllabus 2018 


Test Format of GRE and GMAT

GRE Test Format
GRE is Offered as a computer adaptive by section exam
GMAT Test Format 
GMAT is a computer-adaptive test


How GRE and GMAT are Scored ?

GRE Score Calculation 
Verbal and Quantitative scores from 130 to 170 in 1-point increments
GMAT Score Calculation
In case of GMAT, the overall or composite GMAT score ranges from 200 to 800 in 10-point increments

🌓READ THIS ALSO:-

GMAT Exam Pattern and Syllabus 2018 


GRE and GMAT Cost

GRE Cost
GRE costs around $195
GMAT Cost
GMAT cost is nearly $250


GRE and GMAT Exam Durations


GRE Exam Duration
Using paper - 3.5 hours  
Using computer- 3.75 hours 
GMAT Exam Duration
It is of 3.5 hours


GRE and GMAT Score Validity

Validity of GRE Score
GRE score validity period is 5 years
GMAT Score Validity
GMAT Score is valid for 5 years


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GMAT Exam Pattern and Syllabus 2018 - Latest Pattern of GMAT 2018 -Graduate Management Admission Test (GMAT)

Graduate Management Admission Test (GMAT) is an international level exam for MBA. Nearly 2300 graduate business schools accept the GMAT exam score around the world. Here we will discuss the syllabus for GMAT. You will also find the GMAT exam pattern here.


Analytical Writing Assessment (GMAT)

*One question is asked from this section. The type of question asked in this section is analysis of an argument.
*It is of 30 minutes duration and 
*Score range is 0-6 in 0.5 point increments.


GMAT Exam Pattern and Syllabus 2018 Video


 

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GRE Vs GMAT-Is GRE better than GMAT !!!

Integrated Reasoning (GMAT)

*It consists of 12 questions. 
*The type of questions in this section include- multi source reasoning, graphics interpretation, table analysis and two part analysis. 
*This section is of 30 minutes. 
*The score range is 1-8 in one point increments.


Quantitative Reasoning (GMAT)

*This section contains 37 questions
*The type of questions asked are data sufficiency and problem solving. 
*Duration of the section is 75 minutes and 
*Score is 0-60 in one point increments

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GRE Exam Pattern and Syllabus 2018 

Verbal Reasoning (GMAT)

*Verbal reasoning section contains 41 questions *Comprehension, critical reasoning, sentence correction are types of questions asked in this section. 
*Verbal reasoning section is of 75 minutes and
*Score Range is 0-60 in one point increments.


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Largest Deserts in the World

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Important Signs and Symbols with their Meanings (Complete List)

First in the World (List of First in the World, Male and Female) - The Complete List !!!

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Famous QUOTES by Albert Einstein | Albert Einstein Quotes | Inspirational Quotes about Life

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What Happens Every SECOND! What Happens Every Second in the Universe, World, Our Body, Nature, Economy and on the Internet

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GRE Syllabus 2018-2019- GRE Exam Pattern and Syllabus 2018 (Graduate Record Examinations Syllabus 2018-2019)

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GRE Vs GMAT - A Comparison of GRE and GMAT - Is GRE better than GMAT !!!

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10 Aug 2018

Acceptance Angle and Numerical Aperture (NA) (Optical Fiber Communication)

In this post we will discuss two important concepts of optical fibers, these are- Acceptance Angle and Numerical Aperture (NA).

Definition of Acceptance Angle

Acceptance angle is the maximum angle with the axis of the Optical Fiber at which the light can enter into the optical fiber in order to be propagated through it.

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Optical Fiber Communication (Complete)

Now let's understand this concept with the help of this diagram-


Acceptance Angle and Numerical Aperture (NA), optical fibers, Acceptance Angle, Numerical Aperture (NA)
Acceptance Angle and Numerical Aperture (NA) in Optical Fiber

This diagram clearly illustrates the concept of the numerical aperture and acceptance angle. What we mean by Acceptance cone, is also explain here.


Watch the Complete Video Here


 


Structure and Working of the Optical Fiber

Now observe this diagram carefully, two layers of the Optical Fiber- Core and Cladding can be seen in the diagram. These are drawn in pink color. The light rays propagate inside the core that has another layer over it, known as cladding.
Although other protective layers are also there over the cladding layer, But only core and cladding are shown in this image, which is enough to clear the concepts.

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STEP INDEX OPTICAL FIBER (MULTIMODE AND SINGLE MODE STEP INDEX FIBERS)
OPTICAL FIBER SOURCES (DESIRABLE PROPERTIES)

The refractive index (the ratio of speed of light in vacuum and the speed of light in the medium) of the core is more than the refractive index of the cladding.
As we also know that, when a light ray propagates from a denser medium to the rarer medium, it deviates away from the normal. But when the angle of incidence is more than the critical angle then this light ray returns back into the same medium. This phenomena is called as the 'Total Internal Reflection' (TIR). 
Although it is a special case of refraction where the incidence angle is more than the critical angle, but here it seems like a reflection phenomena and the light ray is totally reflected back into the same medium. Therefore this phenomena is known as the Total Internal Reflection (TIR).

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OPTICAL FIBER: STRUCTURE AND WORKING PRINCIPLE

The same phenomena of total internal reflection takes place in the optical fibre. Here the core acts as a denser medium while the cladding as a rarer medium. So the light rays propagate inside the core of the optical fiber with the total internal reflections.
But as we have already discussed that for the total internal reflection to take place, it is required that the incidence angle must be more than the critical angle. If this condition is satisfied then the light ray can propagate inside the core of The optical fiber with total internal reflection.

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ADVANTAGES OF OPTICAL FIBER COMMUNICATION
Single-Mode Optical Fiber Advantages

Now again observe the image. This image shows two light rays. Focus on any one light ray. You will see that total internal reflection takes place inside the core every time at the core cladding interface. The reflected ray after total internal reflection acts as the incident ray for the next total internal reflection. As each time the incidence angle is more than the critical angle at the core cladding interface. Therefore the light ray propagates inside the core of The optical fibre with successive total internal reflections.

NOTE- For much better explanation, I suggest you to watch my video lecture given above on this page.


Acceptance Angle and Acceptance Cone

Now first we will understand the concept of acceptance cone. You can see this acceptance cone in the image given above. For the total internal reflection to take place, it is required that the light rays entering into the fibre must be confined to this cone.
It means that if there is any light ray that is entering into the fiber with an angle which is outside this cone, then the total internal reflection will not take place. Because in this case the incidence angle will be smaller than the critical angle (Visualize this condition by observing the image or you may watch the video given here). 

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Graded Index Fibers: Basics, Structure and Working

You can understand it easily with the help of this image also. According to this image, if the angle theta 1 reduces to a certain limit then this light ray goes out of the acceptance cone.
In other words we can say, if the light ray is out of the acceptance cone, then the incidence angle is smaller than the critical Angle and in this case total internal reflection will not take place.

Now you know the concept of acceptance cone. So it is very easy to understand, what is acceptance angle.
Acceptance angle is just the conical half angle of the acceptance cone. This acceptance angle is shown in the diagram here.

As already defined, "Acceptance angle is the maximum angle with the axis of the optical fiber at which light can enter the fiber, in order to be propagated through it".
The light rays that are outside this acceptance cone are not accepted by the optical fiber, that's why it is known as acceptance cone.

Let's now discuss what is Numerical Aperture...


Numerical Aperture (NA)

Numerical aperture in case of optical fiber communication can be defined as- "The light gathering (collecting) capacity of an optical fibre".

The numerical aperture provides important relationship between acceptance angle and the refractive index of the core and cladding.

These relationships are given here in the image below-


Formulas for Numerical Aperture (NA) and Acceptance Angle

Acceptance Angle and Numerical Aperture formula, Numerical Aperture formula
Numerical Aperture and
Acceptance Angle Formulas

Read More-

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7 Aug 2018

Current Affairs 7 August 2018 in Hindi/ Daily Current Affairs and News/ करेंट अफेयर्स हिंदी

आंध्र प्रदेश में मुख्यमंत्री द्वारा दुनिया की पहली थर्मल बैटरी का उद्घाटन किया गया

*मुख्यमंत्री चंद्रबाबू नायडू ने आंध्र प्रदेश के अमरावती में दुनिया का पहला उच्च ऊर्जा भंडारण उपकरण लॉन्च किया
*इसकी लागत लगभग 660 करोड़ रुपए है
*इसकी क्षमता वर्तमान में 1000 मेगावाट है जिसे बाद में बढ़ा दिया जाएगा
*इस उच्च ऊर्जा भंडारण उपकरण को भारत एनर्जी स्टोरेज टेक्नोलॉजी प्राइवेट लिमिटेड (बेस्ट) द्वारा निर्मित किया गया है


भारत का पहला ह्यूमेनोइड रोबोट 'रश्मी' विकसित किया गया

*रणजीत श्रीवास्तव ने भारत का प्रथम ह्यूमेनोइड रोबोट 'रश्मी' विकसित किया
*इसे हॉन्गकॉन्ग आधारित कंपनी द्वारा बनाए गए ह्यूमेनोइड रोबोट 'सोफिया' का भारतीय संस्करण भी बोला जा रहा है
*यह रोबोट हिंदी, अंग्रेजी, भोजपुरी तथा मराठी भाषाएं बोल सकता है
*इस रोबोट को बनाने में आर्टिफिशियल इंटेलिजेंस (AI) का उपयोग किया गया है


स्टार्टअप अकादमिक गठबंधन कार्यक्रम लॉन्च किया गया

*भारत में उद्यमिता की भावना को बढ़ाने के लिए स्टार्टअप इंडिया ने 'स्टार्टअप अकादमिक गठबंधन कार्यक्रम' लॉन्च किया

Current Affairs 6 August 2018 in Hindi/ Daily Current Affairs and News/ करेंट अफेयर्स हिंदी

भगोड़ा आर्थिक अपराधी विधेयक को राष्ट्रपति रामनाथ कोविंद ने मंजूरी दी

*राष्ट्रपति की मंजूरी मिलने के बाद यह विधेयक अपराधियों को कानूनी प्रक्रिया से बचकर देश से भागने पर रोक लगाएगा
*इस विधेयक के अनुसार दोषी व्यक्ति को भगोड़ा घोषित करके उसकी संपत्ति जब्त की जा सकती है


चीन ने अपने अत्याधुनिक हाइपरसोनिक एयरक्राफ्ट जिंगकोंग-2/स्टारी स्काई-2 का सफल परीक्षण किया

*इस हाइपरसोनिक एयरक्राफ्ट की खास बात यह है कि यह किसी भी एंटी मिसाइल रक्षा प्रणाली को भेद सकता है
*यह एयरक्राफ्ट परमाणु हथियार ले जाने में भी समर्थ है


बेंगलुरु में डिफेंस इंडिया स्टार्टअप चैलेंज लॉन्च किया गया

*रक्षा मंत्री निर्मला सीतारमण ने बेंगलुरु में डिफेंस इंडिया स्टार्टअप चैलेंज लॉन्च किया


अब उत्तर प्रदेश का मुगलसराय रेलवे जंक्शन बना दीनदयाल उपाध्याय जंक्शन

*उत्तर प्रदेश के प्रतिष्ठित मुगलसराय रेलवे जंक्शन का नाम बदलकर दीनदयाल उपाध्याय जंक्शन रेलवे स्टेशन रख दिया गया है


यूनाइटेड किंगडम (UK) द्वारा नया अंगदान कानून जारी किया गया

*UK ने देश में भारतीय मूल के नागरिकों के लिए अंग और ऊतक दान कानून जारी किया
*इस कानून के बाद अंगों की तत्काल आवश्यकता पूरी की जा सकेगी

4 Aug 2018

Intelligence Agencies of the World/ Intelligence Agencies

Here are the World's Famous Intelligence Agencies

Central Intelligence Agency (CIA),
Federal Bureau of Investigation (FBI) - United States of America (USA)

Top Intelligence Agencies  of the World, Intelligence Agencies of the World, best Intelligence Agencies of the World, Top Intelligence Agencies
Top Intelligence Agencies
of the World

Research and Analysis Wing (RAW),
Intelligence Bureau (IB),
Central Bureau of Investigation (CBI) - India

Canadian Securities Intelligence Services
Criminal Intelligence Service - Canada

Bureau of State Security - South Africa

Aisi Internal " Information and Security Agency" - Italy

Australian Security and Intelligence Organisation (ASIO) - Australia

Secretariat of Intelligence (SI)
National Intelligence School (ENI) - Argentina

New Zealand Intelligence Agency
Security Intelligence Service- New Zealand

State Intelligence Service (SIS) - Sri Lanka

Joint Intelligence Organisation (JIO)
Military Intelligence (MI) - 5 and 6, Special Branch (SB) - United Kingdom

BND - Germany

Intelligence System of Portuguese Republic (SIRP) - Portugal

Mossad - Israel

Central External Langa Department (CELD) - China

NIACHO - Japan

KGB/GRU - Russia

General Directorate for Internal Security (DGSE) - France

Almukhbirat - Iraq

Special Detective Unit (Police Intelligence) - Ireland

Sawac, Ministry of Intelligence - Iran

Al-Mukhabarat - Egypt

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