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

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

CBSE Physics Papers (Previous years)

With the number of posts in the blog growing, I revisited the posts and decided to classify & club a number of similar posts in a single post. This would make the site user-friendly. The users

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

The rubber band actually expands

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

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

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

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

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

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