Solar Radiation, Heat Balance & Temperature - Chapter 9 Geography NCERT Class 11 Part 1

Video lecture, lesson summary, revision notes and solutions of CBSE NCERT Geography Class 11 Chapter 9 Solar Radiation, Heat Balance and Temperature Part 1. This educational video is important and forms foundation for UPSC / IAS, SSC CGL, CDS, NDA and other school examinations.
**Time Stamp**
1. SOLAR RADIATION @ 1:54
2. Variability of Insulation at the Surface of the Earth @ 7:06
3. The Passage of Solar Radiation through the Atmosphere @ 12:48
Part 2 of this chapter :-
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Class 9 - goo.gl/AIEXxQ
Class 10 - goo.gl/inWIAR
Class 11 (Part 1) - goo.gl/Pn5EIE
Class 11 (Part 2) - goo.gl/X4zY9K
Class 12 - goo.gl/Kszpz5

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8:14 The direction of rotation should be from West to East 😊😊😚😙

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What is the difference between vernal equinox and autumnal equinox...?..., Like how we get spring during vernal equinox and *autumn* during autumnal equinox..when both of the time Earth receives same amount of heat...??????

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Correct me if I am wrong sir. In fig 9.1, the tropic of cancer is at 90* as compared to equator(66.5*). So does that mean tropic of cancer receive more sun light during summer solstice? And I more hotter?

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Sir in January, ocean currents in Northen hemisphere go towards Arctic region I understand, but in same in southern hemisphere why ocean currents never go to antarctic region and make little bend toward equator region land , I never really understand this,your videos are awesome and it really helped me but will u pls answer my query?

[@bikrambeas]

Dear Aspirant, your question can be answered in many ways. 1. Since the Southern Hemisphere consists of more water than land and similarly in Northern Hemisphere there is more land than water due to which the there is a huge difference of temperature and pressure. Pressure gradient force is less as the isotherms of the Antarctic region are more straight lines. So, the movement of wind becomes less towards such regions because wind requires the strong zone of convergence or divergence. Moreover it is a very pressure zone which inhibits the ocean currents to its sides. 2. On the other side the presence of both more land and water makes the pressure gradient force more active and thus the wind i.e. North Atlantic Drift blows towards Arctic region during winters and thus makes the ocean warm and suitable for navigation. 3. This may be the particular case in January because in this month the sun is over Tropic of Capricorn i.e. sun rays fall 90 degree on this latitude and thus makes the air warm and rises up to create a low tropical pressure zone thus attracts the winds from the south polar region which has extremely high pressure that ultimately cause wind to bend towards this tropical or equatorial zone.

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For more information, read and analyse the temperature, pressure and ocean currents on the atlas carefully.

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hello sir I have little confusion, you said "within troposphere ozone existed" so its tropos or stratos? 13:20

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We have tropospheric and stratospheric ozone (bad and good ozone)

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13:22 ozone is in Stratosphere know ????? sir , you said it is in troposphere

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[@chandrapalsinghkaurav7661]

in( V) book is not saying about tempreture of landmasses rather it say about solar radiation per unit area and you have left the sentance how atmospheric circulation masked the effect of perihelion and apehelion on daily weather changes

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Please try to teach other subjects also like history, English, pol. science and more

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sry after chapter 9 in class 11

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Watching this lecture on 3rd January, I.e. Perihelion