What is Active and Passive Remote Sensing?

Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation. Remote sensing is used in numerous fields, including geography, land surveying and most Earth Science disciplines (for example, hydrology, ecology, oceanography, glaciology, geology); it also has military, intelligence, commercial, economic, planning, and humanitarian applications.
There are two types of remote sensing technology, active and passive remote sensing. Difference between these two is quite small, however, leaves great impact on their functionality. As we learnt in primary school, sun constantly emits light energy and is only source of natural light for earth. Moreover, this energy is not observed by any component in solar system. Instead it is reflected to somewhere else. Just like the moon, it shines despite of not possessing its own light source.
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[@arunganesansivakumar4397]

What an explanation!!! No book can define this this simple. Thanks professor

[@kobebarka8633]

I’m trying my hand at writing a Sci-fi story and your explanation greatly helped me get past a barrier in my writing! Thank you so much!

[@shitalaprasadyadav607]

you explained it very simply and in a way that is understandable easily by most of us.

[@liamdavis4058]

Your camera example was wonderful. Thanks!

[@HareeshKumar-dd1lo]

Very good and wonderful way of teaching,sending love from Pakistan.

[@lavena_Fatin]

Now that's what you call crystal clear
Got it without leaving a spot

[@afzalhussainarzoo727]

The way of explanation is superb

[@baadalhardas720]

Very helpful...Wow..sir your way of explanation is ammazing👍🏻👍🏻👍🏻thank u sir😇❤

[@faizazhar1162]

Active sensors are those which use own source of light for eg in a dark room flash of mobile is use
Passive sensor are those which not use it own source of light for eg in a room with the help of bulb sun light we dont use flash we attain light from other sources such as bulb and sun

[@mythoelogy]

These videos have been the most helpful in understanding the concept, thanks Geospatial World! :)

[@geospatialmedia]

Happy to hear that!

[@abhishekgautam1168]

You have made learning very simple.Thank you

[@josekalaiarasan3708]

very much simple and valuable, thank you sir.

[@yenesewalemay6382]

Thanks for your,clear and easy presentation

[@clivejack6048]

Excellent explanation. Thank you very much .

[@sivaranjan7945]

Thank you, sir..your way of explanation is so good. I wish you to upload more videos like this !!

[@VISHALrajput-iy5dt]

Thankyou sir for easily anderstandin about remot sensing

[@gurikaur-gi8sy]

U difine the remote sensing type very easy way and reader understand as well as in easy way

[@siddharththakur2960]

Sir gjjb tha ye

[@CrazyCoupleDIY]

Thanks that was absolutely short and to the point explanation

[@iswariya593]

Excellent explanation sir. super I am clear this

[@Kanikadreambig]

What an explanation! Thank you sir ❤

[@bhumikarathod7894]

Thank you sir

[@yusuphmketo9781]

i appreciate DR

[@muhammadismail3460]

I have missed this class but now am not feel that i have missed important class. Thank you sir.

[@payal7270]

Sir make more videoes they are really helpful.

[@sandy3781]

Thanku sir ......

[@user-pr7mp2ed8v]

thanks so much from KSA

[@tariquemohammad2151]

Superb explain sir

[@AliRazvi]

Sirrrr Maakaaaaaa Fight chindiyaaaaaa hai tum 😎😎🔥🔥🔥🔥🔥

[@owangboli4082]

Bravo 🤝🏿

[@ashitharemesh1118]

Thank you sir🙏

[@sabarindbaloch5142]

Amazing! you explained it so well, Thank you

[@YadlapalliIswarya]

Tq Guruji 🙏

[@muhammadzeeshan1752]

classic explanation. Superb Sir. You are Champion.

[@pujanapokharel7313]

Satisfying video.. Thank-you sir for such a clear explanation

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Good video, well explained

[@sm_althaf]

Excellent explanation ❣️

[@timelapsenrg9078]

simple understanding at its best.

[@_NaushinAnjum]

thanks

[@sivangikumari5686]

Thank you so much Sir

[@6JD8]

You explain so well sir

[@jika6173]

Our eyes is passive remote sensing !

[@vishnuprasad1754]

Very good explanations.

[@radhu3499]

You've explained it very well and I'm satisfied with it
thank you
☺️☺️☺️☺️

[@dumisanisanele9796]

Salute

[@johneristube4910]

great

[@laibaraashid3506]

You teach too good your words are too clear to hear ! Thanks sir 💯👍

[@YumHajMania]

Thankss a ton Sir😊

[@anjaliannu1145]

Ur explanation amazed me everytime it gives a pure knowledge abt topic

[@PavanKumar-ft5hi]

Neat

[@jaypeecarquez8479]

THANK YOU

[@zoekwagala8919]

THANK YOU SIR FOR SAVING THE DAY

[@manishkumarjha3427]

Awesome 💛
Love and regards from NEPAL 🇳🇵

[@anatoby2693]

Thank you.its easy and good detail about classification of remote sensing

[@sauravkumarmandal3885]

TQ very much sir

[@farooqsaeed8560]

you've explained very beautifully sir !! thankyou !!

[@dhavalpathak8747]

Understandable!!

[@a.janeamritha2173]

So can we say night vision cameras active?

[@cleahtemko4059]

Wooow explanation

[@anuradhijayasinghe7958]

Thank you for the clear explaination

[@chinmoyborah1982]

what type of remote sensing can LANDSAT images be considered under??

[@sagarkantideb3929]

Sir what about an ideal remote sensing systems??

[@cosminpavel4560]

What about an infrared camera?

[@laxmibommidi9383]

Nice

[@sahilaryan]

ty sir

[@RJ12347]

Highly appreciated

[@andarupramudito9998]

Great analogy!

[@miyamarchang7422]

Awesome...
Thank you

[@tessahh1537]

Nice explanation. Thnkyu sir : )

[@aldevpaundra9938]

that was clear explanation!

[@Abdulmoiz-be8hh]

Still have an confusion! 😥

[@geniusstars9530]

How did you animate your videos

[@71waleed]

THIS IS THE FIRST TIME I UNDERSTAND THESE 2 TYPES

[@ayuuhinna8815]

osm

[@Angelicmoon-]

Thank you so much IT'S AMAZING ME

[@bhavikjoshi4855]

🙌🙌

[@landonorris6]

I have an exam on this tommorow

[@prasantagorai3]

Please help me about satellite images, kindly response sir. I want to learn from you.

[@AbdullahSaleem1]

[@ahmedaz307]

at 1:34, English is wrong, it should be it's imaging me, not amazing me.

[@singsongwriter8679]

F for u language grammar

[@paramamal9834]

Thank you sir