UPSC Materials Notes

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Salut à tous👋 Dear "The Social Fact" readers, We are thrilled to celebrate a small yet significant milestone - our 25th edition of The Social Fact! We are grateful for your constant support and loyalty, which has made this journey possible. Thank you for being an integral part of our community. Here's to many more editions and a continued pursuit of knowledge together! ❤️ In this edition, we focus on the topics- Validity and Reliability, a fundamental to any social research and for our optional paper too. So our cover story deals with every aspects of these topics in "Beyond Basics" ✍️ Along with that, we have our very own "Connecting the dots" section and "Perspectives" which touches upon the new concept like Grey Divorce.👫 For higher resolution pdf : https://www.sivarajavelias.com/the-social-fact/ Join our telegram channel for more information: https://t.me/sivarajavelsociology

📌Ultraviolet (UV)

📌Main Points👇

🔹1st:- Ultraviolet (UV) is a type of light or radiation naturally emitted by the Sun. 🔹2nd:- It covers a wavelength range of 100-400 nm. The human visible light ranges from 380–700 nm. 🔹3rd:- UV is divided into three bands: UV-C (100-280 nm), UV-B (280-315 nm) and UV-A (315-400 nm). 🔹4th:- UV-A and UV-B rays from the Sun are transmitted through our atmosphere and all UV-C is filtered by the ozone layer. 🔹5th:- UV-B rays can only reach the outer layer of our skin or epidermis and can cause sunburns and are also associated with skin cancer. 🔹6th:- UV-A rays can penetrate the middle layer of your skin or the dermis and can cause aging of skin cells and indirect damage to cells’ DNA. 🔹7th:- UV-C radiation from man-made sources has been known to cause skin burns and eye injuries.

Q. आप किस परीक्षा की तैयारी कर रहे हैं? Q. Which exam are you prepared?

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Salut à tous👋 Dear "The Social Fact" readers, We are thrilled to celebrate a small yet significant milestone - our 25th edition of The Social Fact! We are grateful for your constant support and loyalty, which has made this journey possible. Thank you for being an integral part of our community. Here's to many more editions and a continued pursuit of knowledge together! ❤️ In this edition, we focus on the topics- Validity and Reliability, a fundamental to any social research and for our optional paper too. So our cover story deals with every aspects of these topics in "Beyond Basics" ✍️ Along with that, we have our very own "Connecting the dots" section and "Perspectives" which touches upon the new concept like Grey Divorce.👫 For higher resolution pdf : https://www.sivarajavelias.com/the-social-fact/ Join our telegram channel for more information: https://t.me/sivarajavelsociology

✅ उत्तर प्रदेश की राजधानी क्या है❓

🔻आप कौन हो❓❓

Q. आप किस परीक्षा की तैयारी कर रहे हैं? Q. Which exam are you prepared?

✅ उत्तर प्रदेश की राजधानी क्या है❓

Q. आप किस परीक्षा की तैयारी कर रहे हैं? Q. Which exam are you prepared?

Q. आप किस परीक्षा की तैयारी कर रहे हैं? Q. Which exam are you prepared?

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