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absorbed action amount angle arrangement atoms attraction ball battery becomes bismuth body called carbon cause colour conducting conductor connection considered continuous copper decreases depends developed direction distance earth effect electricity equal excited existence fact falling feet force galvanic give given glass greater heat hydrogen increase iron laws leaves length less light falling liquid magnet matter means measure medium metal method mirror motion move nature needle negative object ordinary oxygen parallel particles pass passage piece plate polarised pole portion position prevent probably produce quantity radiation ray of light reach reflected refraction resistance result rise round shown shows side solid sound space string substance surface temperature theory thickness tion transfer turn usually vibration weight whole wire zinc
Página 54 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.