Longitudinal Extend and Time Difference
Duration: 3 min
This video lesson is available to enrolled students.
Inside: a video lesson and guided study material.
Module outline
- Child Development and Pedagogy: Concept of Pedagogy, बालक कैसे सोचते एवं सीखते हैं / How Children Think and Learn, विकास की अवधारणा / Concept of Development, विकास के मनोवैज्ञानिक सिद्धांत / Psychological Theories of Development, Personality Development, व्यक्तिगत भिन्नताएँ, व्यक्तित्व एवं जेंडर / Individual Differences, Personality and Gender, संवेग, अभिप्रेरणा, मानसिक स्वास्थ्य एवं निर्देशन / Emotion, Motivation, Mental Health and Guidance, Understanding Diverse Learners, समावेशी शिक्षा / Inclusive Education, शिक्षण-अधिगम प्रक्रिया / Teaching-Learning Process, शिक्षण विधियाँ एवं रणनीतियाँ / Teaching Methods and Strategies, Experiential Pedagogy, आकलन एवं मूल्यांकन / Assessment and Evaluation, शैक्षिक विचारक, उद्देश्य एवं राष्ट्रीय नीतियाँ / Educational Thinkers, Aims and National Policies, Curriculum Framework & Reforms, Nature, Objectives & Characteristics of Teaching, Learners & Learning Process, Factors Affecting Teaching, कक्षा प्रबंधन और सम्प्रेषण / Classroom Management and Communication, शिक्षण संसाधन और शैक्षिक प्रौद्योगिकी / Teaching Resources and Educational Technology, पाठ्यचर्या और विद्यालयी गतिविधियाँ / Curriculum and School Activities, पाठ योजना और शिक्षण कौशल / Lesson Planning and Teaching Skills, Micro-Teaching & Teaching Skills, Evaluation, Assessment & Measurement, Inclusive Education & Special Needs, Guidance, Counselling & Mental Health, संविधान, आयोग, अधिनियम एवं योजनाएँ / Constitution, Commissions, Acts and Schemes in Education, अधिगम एवं इसके सिद्धांत / Learning and Its Theories, बुद्धि एवं सृजनात्मकता / Intelligence and Creativity
- Language I — Hindi: भाषा, लिपि और वर्ण-विचार, संधि, शब्द-स्रोत और शब्द-रचना, समास, शब्द-भेद: विकारी और अविकारी, लिंग, वचन, कारक, काल और वाच्य, वाक्य-विचार और शुद्ध लेखन, शब्द-भंडार, रस, छंद, अलंकार और शब्द-शक्ति, हिंदी साहित्य, अपठित बोध, हिंदी शिक्षणशास्त्र
- Language Pedagogy (Language I and II): Language Pedagogy (Hindi/English/Sanskrit/Urdu learning & teaching)
- Language II — English: Sounds, Spelling and Word Formation, Parts of Speech, Nouns and Pronouns, Articles, Determiners and Adjectives, Verbs and Modals, Tenses and Subject–Verb Agreement, Adverbs, Prepositions and Conjunctions, Sentence Structure, Voice and Narration, Vocabulary, Sentence Correction and Writing Skills, Poetry and English Literature, Reading Comprehension, Pedagogy of English Language
- Language II — Urdu: رسم الخط، املا اور تلفظ, ذخیرۂ الفاظ, قواعد, محاورے اور ضرب الامثال, شعر و سخن, اردو ادب کی تاریخ, تفہیمِ عبارت, اردو کی تدریس
- Language II — Sanskrit: वर्णविचारः एवं संज्ञाप्रकरणम्, सन्धिप्रकरणम्, शब्दरूपाणि, धातुरूपाणि, कारकाणि एवं विभक्तयः, उपसर्गाः एवं अव्ययानि, प्रत्ययप्रकरणम्, समासप्रकरणम्, वाच्यप्रकरणम्, संख्याज्ञानम्, शब्दज्ञानम् एवं अनुवादः, अपठितावबोधनम्, संस्कृतसाहित्यम् एवं काव्यशास्त्रम्, संस्कृतशिक्षणशास्त्रम्
- Mathematics: Mathematics Pedagogy, भिन्न एवं दशमलव / Fractions & Decimals, गुणनखंड, विभाज्यता, म.स.प. एवं ल.स.प. / Factors, Divisibility, HCF & LCM, प्रतिशत, लाभ-हानि एवं ब्याज / Percentage, Profit–Loss & Interest, अनुपात, समानुपात, औसत एवं आयु / Ratio, Proportion, Average & Ages, समय-कार्य एवं चाल-दूरी / Time & Work and Speed–Distance, बीजगणित / Algebra, त्रिभुज, चतुर्भुज, वृत्त एवं त्रिकोणमिति / Triangles, Quadrilaterals, Circles & Trigonometry, क्षेत्रमिति: परिमाप, क्षेत्रफल एवं आयतन / Mensuration: Perimeter, Area & Volume, आँकड़ा प्रबंधन, सांख्यिकी एवं प्रायिकता / Data Handling, Statistics & Probability, गणित शिक्षणशास्त्र / Mathematics Pedagogy, संख्या पद्धति एवं स्थानीय मान / Number System & Place Value, रेखाएँ, कोण, आकृतियाँ एवं निर्देशांक / Lines, Angles, Shapes & Coordinates, मूलभूत संक्रियाएँ, सरलीकरण एवं पैटर्न / Basic Operations, Simplification & Patterns, मापन: लंबाई, भार, धारिता, समय एवं मुद्रा / Measurement: Length, Mass, Capacity, Time & Money, वर्ग, घन, घातांक एवं करणी / Squares, Cubes, Exponents & Surds
- Environmental Studies: परिवार, मित्र और समुदाय / Family, Friends and Community, पौधे / Plants, EVS Pedagogy, उत्तर प्रदेश सामान्य ज्ञान / Uttar Pradesh GK, जंतु / Animals, खेती और पशुपालन / Farming and Animal Husbandry, भोजन और पोषण / Food and Nutrition, शरीर और स्वास्थ्य / Body and Health, जल / Water, आवास / Shelter, यात्रा, परिवहन और संचार / Travel, Transport and Communication, मानचित्र, दिशाएँ और भारत / Maps, Directions and India, हम क्या बनाते और करते हैं / Things We Make and Do, पृथ्वी, आकाश और आपदाएँ / Earth, Sky and Disasters, पर्यावरण, पारिस्थितिकी और वन्यजीव / Environment, Ecology and Wildlife, प्राकृतिक संसाधन, प्रदूषण और जलवायु परिवर्तन / Natural Resources, Pollution and Climate Change, पर्यावरण अध्ययन का शिक्षणशास्त्र / Pedagogy of Environmental Studies
- Mathematics (Video Lessons & Notes): Number System, Divisibility Rules, HCF LCM, Algebra, Ratio and Proportion (Ratios), Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Speed Time and Distance, Mensuration and Geometry, Statistics, Data Interpretation, क्रम, बैठक व्यवस्था एवं पहेली / Ranking, Seating Arrangement & Puzzles, कैलेंडर एवं घड़ी / Calendar & Clock
- Environmental Studies (Video Lessons & Notes): Biology, Chemistry, Geography, History, Physics, Polity, Environment, Ecosystem, Biomes & Environmental Issues, MDG & SDG, Air Pollution, Water Pollution, Soil, Noise Pollution and Waste Management, Natural Resources, Energy & Disaster Management, State Wise GK
AI summary & chapters
AI Summary
An AI-generated summary of this video lecture.
The video is a lecture on the longitudinal extent and time difference in India, presented on a digital whiteboard. The instructor begins by stating that India spans 30 degrees of longitude, from 68°7'E to 97°25'E. The core concept explained is that each degree of longitude corresponds to a 4-minute difference in time. Using this, the total time difference across India is calculated as 30 degrees multiplied by 4 minutes, which equals 120 minutes, or 2 hours. The lecture concludes by applying this to a real-world example: the sun rises approximately two hours earlier in Arunachal Pradesh (the easternmost state) compared to Gujarat (the westernmost state). The instructor uses on-screen text, handwritten calculations, and a diagram of the Earth to illustrate the concept.
Chapters
0:00 – 2:00 00:00-02:00
The video opens with a slide titled '6. Longitudinal Extent and Time Difference'. The instructor states that India extends over 30 degrees of longitude, from 68°7'E to 97°25'E. The key principle is introduced: each degree of longitude corresponds to 4 minutes of time difference. The calculation is shown as '30 degrees x 4 minutes = 120 minutes = 2 hours'. The slide text explains that this means the sun rises about two hours earlier in the easternmost part of India (e.g., Arunachal Pradesh) than in the westernmost part (e.g., Gujarat). The instructor begins to write a calculation on the board, starting with '360° = 24 hours'.
2:00 – 3:17 02:00-03:17
The instructor continues the calculation on the whiteboard. He writes '360° = 24 hours' and then divides 24 hours by 360 degrees to find the time per degree, writing '24/360 = 1/15 hours'. He then converts this to minutes, writing '1/15 hours = 60/15 = 4 minutes'. This confirms the 4-minute rule. He then draws a diagram of the Earth, showing the 30-degree longitudinal span from 68°7'E to 97°25'E, and circles the 30-degree difference. He reiterates the final calculation: '30 degrees x 4 minutes = 120 minutes = 2 hours'. The on-screen text remains visible, reinforcing the concept that this time difference causes the sun to rise two hours earlier in the east.
The lecture systematically explains the relationship between longitude and time. It starts with the factual extent of India's longitudinal span, establishes the fundamental rule that 1 degree of longitude equals 4 minutes of time, and then applies this rule to calculate the total time difference across the country. The process is reinforced with a step-by-step calculation on the board and a visual diagram of the Earth, culminating in a practical example of how this time difference affects the sunrise time between the eastern and western extremities of India.