Class 10 Physics Light, Summaries of Physics

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LIGHT Sige ° tk isa ype of energy, rOrponson for he Sense of “ight. . Lignt itself cannot be Seen. Th at were visible, the universe would not appear dark. "Tk is a on - mechanic transverse wave , whith allows it tr perpogal Anragh \ocuums * Speed gy light 7 3x 10" m/s * Reflection a, Light * The procems aH, sending back lignt waves tohich fall on “the Surface of an objec. * Lows a Refledion * Angle 9, incidence = Angle 9, reflection Zi = Zr Dist. bw Wg obtarined From mirror j$ ty Same OS te distance lofty the ole from hy mirrir- *€ Loteral Inversion * Tk ie the phenomenon wohene left Of) wight Famelrall J 2 vice versa of}. How you think you look How you actually look. — Lore RSohericak_ irr "Tk is a Sphere whose reflecting Surface js ~“’ part q a gphere , A Concave miveoy * His a spherical mirror tat hor ity reflecting Suejace curved inwedd * Tt converges lignt rays thot fol ow it- Ais ewewwr 0 Converging misror: * Unad in Showing mirrors, telescopnr , head lights , etc. > Convex miso : Tk ya Spherical wiveor snose reflecting Surfed 15 Curved tnuardr. Divergur Ugh rays falling on it - Alsu caked diverging mie - Used in stow view minmrs, Ceorrity mnirsors, ete. #8 P 5C = Rodi af canrvatre ca) PE = Local ten CF) Agerture_ > Diameter hy th reflecting Suiface 4, The Spheritgh mirror. K Rules to gutain Mager 7 Rule | “A (4 paralle| she princi iS wil ough focus rd econ - Ft Image formation — Concaw mirror Position of the Position of the Size of the Nature of the object image image image At infinity At the focus F Highly diminished, Real and inverted point-sized Beyond C Between F and C Diminished Real and inverted At C At C Same size Real and invented Between C and F Beyond C Enlarged ~ Real and inverted AtF At infinity Image would not be formed Between P and F Behind the mirror Enlarged Virtual and erect # Trg formaliow — Conves mirror Position of the Position of the Size of the Nature of the object image image image At infinity At the focus F, Highly diminished, Virtual and erect behind the mirror point-sized Between infinity Between P and F, Diminished Virtual and erect and the pole P of behind the mirror the mirror AE Some fermr for Sdving wumericalr V7 Miner & Twoy VT distance. UF Mmr A Ovject Gt distome. 4 > doca length - m- magnefication *K miner Formula - om = lige = ve Y h ovect KU A student wouds & oltain on erect Wang of On object Using % Conant wivsor % Foeal length lOcm. lohat will ae tu distance of +x okjet From te miyror: Legs than locm. , at Hu Ty, the height of an object iS Yen and he heignt ia she image formed by a rrierrr iS Bem , fied the magneticalon h; = ~ Sem m= hi = -2 =-2 ho 4 ho >= Ym 2K Refeoetion of Ligne * Refraction is when light Changes its path to move from one material to ancther- * This bending happens because diferent materials have diferent aptical denctien — Reason * Refraction occurs dus te Chounge in Spud 4, git in OH. mediaws. HK Orticad Density Ts Bend ® N speed A Refraction through a rectangular lass Slab * Refraction Inappens “twit . Ligkt enters th Slalo bendy towards —the normod Celowing down) and exits tet Slabb, bending away from tar normal Csperding o) ° L= Le Cars Ongle of ewergance ) * Gwergenk ray 18 always paralel ts the indiduit ray — just swifted "The Shift is a “Sidrvoays’ stihl * Thicker sl = moe gift ° Refractive index C olenser gas ) CO Mere swift - ’ . n= vefractive Mdex ° Th Math 9 Snell’s lau —2 n= sin 1 = angle oF incidence sine T= ougie of refraction * Absolat. Refractive Inden — when ligur travel “From vacuum te madiuw. => n= c C= Speed 4 light in ROCK UWA —— Vi [ws spud oF Ugiet OY wadium Relative Refractive Indeo 3 when light travels from medium Cl) -b wediuwt2) PON, = te = MM h Vp ’ *K kul af image formalion by a ww => Rub 1 * Light Rous povalld IGT a focur BV fass aR | K Tnoy fomslion by neque mit -osition of the Position of object tt Nature of the image * Thy LENS FORMULA Vv YU h, Y * Powth Lenn Vv * The ability u Q dow to Converge or dlivengs ght , mroaured in dioplus (0). $