American Edition of the British Encyclopedia: Or, Dictionary of Arts and Sciences ; Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Τόμος 1Mitchell, Ames and White, 1819 |
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... direction , had also a transverse motion , in a direction contrary to that of the tube . The axis of a telescope , or even of the eye , may be considered as resem bling such a tube , the passage of the light through the refracting ...
... direction , had also a transverse motion , in a direction contrary to that of the tube . The axis of a telescope , or even of the eye , may be considered as resem bling such a tube , the passage of the light through the refracting ...
Σελίδα
... direction . Sound describes equal spaces in equal times . There is probably no substance which is not in some measure a conductor of sound ; but sound is much enfeebled by passing from one medium to another . If a man , stopping one of ...
... direction . Sound describes equal spaces in equal times . There is probably no substance which is not in some measure a conductor of sound ; but sound is much enfeebled by passing from one medium to another . If a man , stopping one of ...
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... direction of the axis , strike against the sides of the tube , and every point of impulse becoming a new centre , from whence the pulses are progagated in all directions , a pulse will arrive at the ear from each of those points . Thus ...
... direction of the axis , strike against the sides of the tube , and every point of impulse becoming a new centre , from whence the pulses are progagated in all directions , a pulse will arrive at the ear from each of those points . Thus ...
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... directions . It is said that the report of a cannon ap- pears many times louder to a person to wards whom it is fired , than to one placed in a contrary direction . It must , says Dr. Young , have occurred to every one's ob- servation ...
... directions . It is said that the report of a cannon ap- pears many times louder to a person to wards whom it is fired , than to one placed in a contrary direction . It must , says Dr. Young , have occurred to every one's ob- servation ...
Σελίδα
... direction , they will be reflected back in the same line ; and if a person be situated between a and c , as at r , he would hear the sound of the bell by means of the undulations as they went to the wall , and he would hear it again as ...
... direction , they will be reflected back in the same line ; and if a person be situated between a and c , as at r , he would hear the sound of the bell by means of the undulations as they went to the wall , and he would hear it again as ...
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American Edition of the British Encyclopedia, Or Dictionary of Arts ..., Τόμος 4 William Nicholson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
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