Cyclopædic Science simplified ... With ... illustrations |
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Page 14
... direction , like the spokes of a wheel . Owing to the manner in which light is distributed and transmitted in straight lines diverging from each other , its intensity diminishes as the square of its distance from the luminous source ...
... direction , like the spokes of a wheel . Owing to the manner in which light is distributed and transmitted in straight lines diverging from each other , its intensity diminishes as the square of its distance from the luminous source ...
Page 15
... direction of the rays from the lamp , and L , the wax candle w c . Example : the distance of the lights from the box being respectively 12 ft . and 3 ft . — 12 X 12 = 144 ÷ 3 X 39. Quotient , 16 . In the practice of photometry the ...
... direction of the rays from the lamp , and L , the wax candle w c . Example : the distance of the lights from the box being respectively 12 ft . and 3 ft . — 12 X 12 = 144 ÷ 3 X 39. Quotient , 16 . In the practice of photometry the ...
Page 18
... direction , and thus bring to the neutral state the partially polarized beam c d ( Fig . 16 ) , so as to get the images g D free from colour . It is so adjusted that when at the zero point it produces an equal effect on both discs . II ...
... direction , and thus bring to the neutral state the partially polarized beam c d ( Fig . 16 ) , so as to get the images g D free from colour . It is so adjusted that when at the zero point it produces an equal effect on both discs . II ...
Page 21
... direction ; and the like reasoning applies to the horizontal position . 2nd , the in- cident and reflected rays always form equal angles , or when light falls upon any surface , whether plane or curved , the angle of re- flection is ...
... direction ; and the like reasoning applies to the horizontal position . 2nd , the in- cident and reflected rays always form equal angles , or when light falls upon any surface , whether plane or curved , the angle of re- flection is ...
Page 49
... direction . If a small pocket - pistol were now aimed at the coin and the bullet discharged it would certainly miss , because every visible object appears to be in a direction repre- sented by a straight line drawn from it to the eye ...
... direction . If a small pocket - pistol were now aimed at the coin and the bullet discharged it would certainly miss , because every visible object appears to be in a direction repre- sented by a straight line drawn from it to the eye ...
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acid action air-pump angle apertures apparatus arrangement axis ball barometer battery bismuth body boiling brass called carbon cause charged chemical circuit coating coil colours condensing conductor connected constructed copper cylinder described diameter direction disc discharge dry pile effect elec electric current electrical machine electro-magnet electroscope engine equal experiments flame fluid force galvanometer gases glass heat hydrogen inch induction instrument insulated iron latent heat latter length lens Leyden jar light lines magnetic mercury metal mirror motion needle observed obtained paper particles pass piece piston placed plate platinum polarized pole Polytechnic position pressure prism produced pump quantity rays reflected refraction resistance rheostat screw shellac shown side silver Sir Charles Wheatstone sound spark spectrum steam string substance sulphuric acid surface telegraph temperature thermometer tinfoil tion tourmaline tricity tube valve vapour velocity vessel vibrations voltaic wheel whilst wire zinc