Examples in Physics |
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Page 196
... lens : its distance will thus always be positive . This is equivalent to saying that all distances measured from the mirror or lens on the same side as the object or source of light are to be regarded as posi- tive ; and all distances ...
... lens : its distance will thus always be positive . This is equivalent to saying that all distances measured from the mirror or lens on the same side as the object or source of light are to be regarded as posi- tive ; and all distances ...
Page 197
... lens is negative ; of a concave ( divergent ) lens positive , i.e. , for for { concave mirrors concave lenses convex mirrors convex lenses fis positive ( + ) , } ƒ is negative ( - ) , IV . Whenever you have to work out any optical cal ...
... lens is negative ; of a concave ( divergent ) lens positive , i.e. , for for { concave mirrors concave lenses convex mirrors convex lenses fis positive ( + ) , } ƒ is negative ( - ) , IV . Whenever you have to work out any optical cal ...
Page 198
... lens is concave if ƒ is positive , and is convex if ƒ is negative . In solving any problem it is generally advisable to draw a diagram roughly to scale for the purpose of guiding the algebraical work and preventing errors . Find 26. A ...
... lens is concave if ƒ is positive , and is convex if ƒ is negative . In solving any problem it is generally advisable to draw a diagram roughly to scale for the purpose of guiding the algebraical work and preventing errors . Find 26. A ...
Page 206
... lens , its focal length and the radii of curva- ture of its faces were measured , and were found to be f = 35.6 cm . , r1 = 30 · 4 cm . , 12 = 34.5 cm . What was the index of refraction of the glass ? It can be proved1 that the focal ...
... lens , its focal length and the radii of curva- ture of its faces were measured , and were found to be f = 35.6 cm . , r1 = 30 · 4 cm . , 12 = 34.5 cm . What was the index of refraction of the glass ? It can be proved1 that the focal ...
Page 207
... lens , and prove that the optical centre of a plano - convex or plano - concave lens lies on the curved surface . 75. Taking the usual values for the refractive indices of water and glass , prove that the focal length of a glass lens ...
... lens , and prove that the optical centre of a plano - convex or plano - concave lens lies on the curved surface . 75. Taking the usual values for the refractive indices of water and glass , prove that the focal length of a glass lens ...
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acceleration amount of heat ampère angle atmospheric pressure B.Sc barometer battery body of mass Boyle's law C.G.S. units Calculate calorimeter Camb capacity cells centre charge circuit coefficient of expansion column conductor constant convex lens copper cubic centimetres cubical expansion Daniell cells deflection denote density diameter distance dynes electricity equal equation equivalent ergs feet per second Find the specific focal length foot-pounds ft.-lbs galvanometer given glass grammes grammes of water heat-units horizontal horse-power immersed inches internal resistance kilogramme lamp latent heat liquid litres magnetic Matric measured melted mercury metres per second miles minute object ohms piston placed plane pole poundals pounds produced Prove quantity radius raised ratio refractive refractive index Schol shunt specific gravity specific heat sphere steam string surface tangent galvanometer temperature tube vertical vibrations volts volume weight wire