Physics :units and measurement, Lecture notes of Physics

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ac the complete set o NOTE: : f units: system of units 15 \ hi = ae i) ch system IS named in terms of fundamen foes nd MKS system sion of M.K.S syst Q. Explain S-2 units. Ans: This m of units was introduced In 1960. it is an exten system in addition to fength, m@ss and time few other quantities like tempe! current, fuminosity and amount of substance are introduced 45 fundamental qua angle and solid angle are introduced 45 supplementary quantities- Temperature Luminous intensi The two supplementary quantities Pimper eal 4 née angle radian (rad) | Solid angle steradian (sr) | Plane angle (0): It is the ratio of arc length to the radius of the cir gle (0): Ss | circle. a= = radi ; jan (rad) trad = 28% = 57,3° 2n 4