Focus Test 2 - Can You Count The Phone ? #shorts | Focus Test | Zestful Paheli |

Test cross can not be performed in

Assertion:- The image focus ( 2^(nd) focus) and the object focus ( 1^(st) focus) are on the oppostie side of the biconvex or biconcave lens. Reason:- The radii of curvature of a biconvex lens and biconcave lens are on the opposite side of the lens.

Boojho , Paheli and their firend Golu were provided with a test tube each containing China rose solution which was pink in colour .Boojho added two drops of solution 'A' in his test tube and got dark pink colour .Paheli added 2 drops of solution 'B' to her test tube and got green colour.Golu added 2 drops of solution 'C' but could not get any change in colour Suggest the possible cause for the variation in their results.

Sugar solution is given to you in two separte test tubes in one test tube the solution is saturated while in other it is unsatureated what test would you do to identify them ?

Statement-1: The image focus (2^(nd) focus) and the object ( 1^(st) focus) for a biconvex lens are on the opposite side of the lens. Statement-2: The centre of curvature of a biconvex lens are on the opposite side of the lens.

Boojho took some grains of boiled rice in test tube 'A' and Paheli took boiled and chewed rice in test tube 'B'. Both of them poured 1-2 drops of iodine solution into the test tube and observed the colour change. What colour change would they have observed? Give reasons for your answer.