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" IK ; opposite to the hole r is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may, by means of a long screw on the outside of the tube, be made to move backwards or forwards. AB is a remote object ; from which rays... "
Of optics, magnetism, electricity and galvanism - Страница 75
по Jeremiah Joyce - 1825
Пълен достъп - Информация за книгата

Scientific Dialogues: Intended for the Instruction and Entertainment of ...

Jeremiah Joyce - 1809 - 290 страници
...principal focus of which is at i K ; opposite to the hole p is a small mirror r, concave towards the great one ; it is fixed on a strong wire M, and may,...object; from which rays will flow to the great mirror oi: James. And I see you have taken only two rays of a pencil from the top, and two from the bottom....

Elements of Science and Art: Being a Familiar Introduction to Natural ..., Том 1

John Imison - 1822 - 528 страници
...and so fixed to a strong wire M, that it may be moved farther from the great mirror, or nearer to it, by means of a long screw on the outside of the tube, keeping its axis still in the same line, P mn, with that of the great one. Now, since in viewing a...

Lectures on Select Subjects in Mechanics, Hydrostatics, Hydraulics ..., Том 1

James Ferguson - 1823 - 406 страници
...and so fixed to a strong wire M, that it may be moved farther from the great mirror, or nearer to it by means of a long screw on the outside of the tube, keeping its axis still in the same line P mn with that of the great one. Now, since in viewing a very...

Astronomy, as it is Known at the Present Day: With an Account of the Nature ...

George G. Carey - 1825 - 274 страници
...so fixed to a strong wire M, that it may ,be moved farther from the great mirror, or nearer to it, by means of a long screw on the outside of the tube, keeping its axis still in the same line P in n, with that of the great one. Now, since in viewing a...

The Popular Encyclopedia;: pt. 1: Misso-Peculium

Sir Daniel Keyte Sandford - 1837 - 528 страници
...principal focus of which is at IK ; opposite to the hole P is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may, by means of a long screw on i lie outside of the tube, In • made to move backwards or forwards. AB is a remote object, from which...

Scientific Dialogues Intended for the Instruction and Entertainment of Young ...

Jeremiah Joyce - 1838 - 398 страници
...hackwards or forwards. a B is a remote ohject : from which ravs will flow to the great mirror o F. J. And 1 see you have taken only two rays of a pencil from the top, and two from the hottom. T. And in order to trace the progress of the reflections and refractions, the upper ones...

Lectures on Select Subjects in Mechanics, Hydrostatics, Pneumatics, Optics ...

James Ferguson - 1839 - 554 страници
...and so fixed to a strong wire M, that it may be moved farther from the great mirror, or nearer to it, by means of a long screw on the outside of the tube, keeping its axis still in the same line Pmn with that of the great one. — Now since, in viewing a...

Scientific Dialogues: Intended for the Instruction and Entertainment of ...

Jeremiah Joyce - 1841 - 578 страници
...principal focus of which is at i K ; opposite to the hole r is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may, hy means of a long screw on the outside of the tube, be made to move backwards or forwards. AB is a...

The popular encyclopedia; or, 'Conversations Lexicon': [ed. by A. Whitelaw ...

Popular encyclopedia - 1846 - 1018 страници
...principal focus of which is at IK ; opposite to the hole P is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may,...from which rays will flow to the great mirror D F. And in order to trace Die progress of the reflections and refractions, the upper ones are represented...

Scientific dialogues, with corrections by O. Gregory

Jeremiah Joyce - 1846 - 456 страници
...principal focus of which is at IK ; opposite to the hole r is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may,...from which rays will flow to the great mirror D F. /. And I see you have taken only two rays of a pencil from the top, and two from the bottom. T. And,...




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