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Plus Two Physics

How far an object should be placed from the pole of a concave mirror of focal length 20cm to form a real image whose size is 1/5 the size of the object.

The question was asked by jasleen Kaur Bhasin How far an object should be placed from the pole of a concave mirror of focal length 20 cm to form a real image whose size is 1/5 the size of the object? Can you answer this? Post the answers with necessary explanation a comment to this […]

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Plus Two Physics

How was Physics exam?

Students and teachers report that this year’s CBSE Physics exam was of a different kind and many questions were quite new. How did you feel? How was CBSE Physics exam 2017? Any genuine problem cited will help while finalising the marking scheme. So, report the problems which you faced. Students, teachers and parents can post […]

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Plus Two Physics

Change in length of rubber band on cooling

Some where i read that on cooling of rubber band it expands where as when heated it contracts . Why does it happen?Full description.please   Asked Bipin Kumar Answer The rubber band actually expands when it gets colder. This occurs because of the unusual polymer structure of rubber. When the long chains get hotter and vibrate, they […]

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Plus Two Physics

Prof. H.C. Verma | Mechanics Lecture #2

Prof. H.C. Verma | Mechanics Lecture #2 Takes things away: Centrifugal Force

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Plus Two Physics

Prof. H.C. Verma | Mechanics Lecture #1

Prof. H.C. Verma | Mechanics Lecture #1 Let us be noninertial    

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Plus Two Physics

Prof. H.C. Verma | Optics Lecture #6

Prof. H.C. Verma | Optics Lecture #6 | From Blue Sky to Colored Cello tape

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Plus Two Physics

Prof. H.C. Verma | Optics Lecture #5

Prof. H.C. Verma | Optics Lecture #5 | From Unpolarized to Polarized Light