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ors, Stand to hold the mirrors, one object Py, , Two big plane murr, , a, , , , , , , , , , , , a, , , , , , , , , , , , , , , th the help of protractor an angle 30° between the two mirrors, ‘object between two mirrors., ‘total number of images formed in the two mirrors., peat the steps 2 to 4 in the procedure by keeping the two mirrors at an ang}, , le of ay, , nd 180°, , , , , , Number of Images as per the formula, , , , Wo at Bey, Of, , 0s, , 03, , OR, , between the number of images and the ange, , Meeweaces when the..., the. hud. MIBVSS...\S. iene
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concave mirror by obtaining the) «, ine the focal length of cones (tek, : To determine the focal leng gt, i i “es. ;, spent distances :, a hold the mirror, Meter scale, Seteesty ‘, Ny, 4, , Title, , Apparatus: Coneave mirror, Stand tot, , , , Figure : [ Substance "ay, Object/ Subs DO, ean é =, , - Mittor., , A Mt \y, , att, , Main Axis a, , jak A.D, , CLR, , OO eo, , A.|, , | re, , a CCITT TEPUTTTTT TT reer Scaly, e mirror on stand properly. 1. 9, ct and fit it on a stand., , a stand and keep it before the mirror., , before the mirror and measure the distance betwee, image of the object on screen to and fro., tance between the mirror and the screen., , , , , , , , , , , , , n the mirror and obj, ee, , , , Focal Length, f (cm), , , , \S- 33 ty, , , , , , \6. 05 tm
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i f i f sound., , i : rify the law of reflection O} ; 1, ee twine board, White paper, Stop watch, Mirror or Smooth reflecting,, r al plate, Cardsheet for making hollow tubes, Pins, Wodden Screg, as metal plate, ne, , Inference ., ot The ing, , , , , , , Figure :, igu an, , , , Precaution, 1. The, 2. Ears, 3. Theg, , T a, , ably 4. The;, , line,, , , , Pipe Po_ |, , , , , , , , l. The, A.(, 2. Wi, , fro, Arrange the apparatus as shown in figure. A, , ce a stopwatch at the end of the pipe P, as shown in neers ae, range the pipe P, so that the angle of incidence i = tu oe i, low place the pipe P2 in such a way that its one end is pointing in the direction of Tefleg A, pipe. €, low take your ear near the other end of the pipe P, shown in figure and take the pipe —, | plane , where the ticking of the watch is heard clearly., ure the angle of reflection (r) and note it., it the above procedure for 40°, 50°, 60°, 70° asthe valuesofi. =,, any one reading while the ticking of the watch is heard clearly lift the pipeP, slightly =", € table in the same position and try to listen to the ticking of the watch,, , table :, , , , , , , , , , , , , , , , Angle of reflection Do you get >., of sound (r) i=r, , , , , , , , , , , , Bo =o, 44° Ee, SO" L=t, 60" i=¢, =t 99 =
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Inference +, , 1, The incident sound wave, — sound w,, , a 4ve and normal lie in Same... hay, 2. Angle of incidence = Ang €..0.f Sreaues Rekle clon, r =, , Precaution :, , The sound of the Mopwatch should not reach to the listener directly,, , Bar should be held close to the P., 7, , ‘he angle of reflection measure carefully where the reflected soun, he Ost part of the tubes shoul, flection., , 1 is the loudest,, d match perfectly with the line of incidence and the, , ( Multiple C, le Sound range for human is, B, 20Hz-20000Hz C. 20Hz-2000 Hz D. 100Hz-10,000Hz, ind Wave transmitted through a medium, its ............... is transported, i place to another., B, energy C, velocity D, density, the experiment for verifying the law of reflection of sound successfully, , wice Ouc, , tion ), , B. Clean white cloth, , D. Polished wooden board, , _{ Questions J, , behind the precautions to be taken in the experiment of reflection of
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|, , (sii Experiment No. 13, Tite ; To study the pro seacal, saa Soil. J, a ete tus : Test tubes, Test tube stand, Petrydishes. White tile etc i, icals ¢ Baking Soda(Sodium bicarbonst¢~ NaHCO, ). Washing soda(Sodium carbons, Na,CO, .10 H,O), Litmus paper pH paper ete, , , Procedure :, , 1. Take one spoonful each of baking rate dishes respectively, , a reve the two petrydishes on table. Observe, , 3. Prepare aqueous solutions of the two samples., , 4. Test the solutions using litmus paper, Place two drops of aqueous solutions of both the samples 07 pH paper and compare 4 5, shades., , pH paper strip on white tile and check the pH of two samples of soda., , and washing, soda in Evo Sepe, ee jes caren ft, the two samples carefully after an half poy,, , s, , , , , , , , , , , , , , , , pHof | Inference, Solution, , e | @acic, , Litmus test, , , , , , Blue litmus -No, , zg, Red litmas - (UBS, , Blue:, Blue litmus - 40 \\ Basic, , change, Red litmus -fUTTS, , Blue. |, , observati ions and other tests, write the properties of baking sods, , , , , , , , , , , , , , , , , , , , , , Paling _sedla ‘6 alco used te, [reduce acid’ ty mM the siomach:, , , , , , 7, , » —*
