The British encyclopedia, or, Dictionary of arts and sciences, 5. kötet |
Részletek a könyvből
6 - 10 találat összesen 73 találatból.
. oldal
... rays ; in which he shows the chief properties of them in plane , convex , and concave sur- faces , in his usual geometrical manner , be ginning with that concerning the equality of the angles of incidence and reflection , which he ...
... rays ; in which he shows the chief properties of them in plane , convex , and concave sur- faces , in his usual geometrical manner , be ginning with that concerning the equality of the angles of incidence and reflection , which he ...
. oldal
... rays into it . In 1970 , Vitellio , a native of Poland , published a treatise on optics , containing all that was valuable in Alhazen , and di- gested in a better manner . He observes , that light is always lost by refraction , which ...
... rays into it . In 1970 , Vitellio , a native of Poland , published a treatise on optics , containing all that was valuable in Alhazen , and di- gested in a better manner . He observes , that light is always lost by refraction , which ...
. oldal
... rays proceeding from a point , is called a pencil of rays . By a medium , is meant any pellucid or transparent body , which suffers light to pass through it . Thus , water , air , and glass , are called media . Parallel rays , are such ...
... rays proceeding from a point , is called a pencil of rays . By a medium , is meant any pellucid or transparent body , which suffers light to pass through it . Thus , water , air , and glass , are called media . Parallel rays , are such ...
. oldal
... ray will not be refracted . It must be observed , that when the angle is within the limit , for light to be refracted , some of the rays will be reflected . For the surfaces of all bodies are for the most part uneven , which occasions ...
... ray will not be refracted . It must be observed , that when the angle is within the limit , for light to be refracted , some of the rays will be reflected . For the surfaces of all bodies are for the most part uneven , which occasions ...
. oldal
William Nicholson. Hence we see the reason why a convex glass causes the sun's rays to burn after passing through it . See BURNING glass . All those rays cross the middle ray in the focus f , and then diverge from it to the contrary ...
William Nicholson. Hence we see the reason why a convex glass causes the sun's rays to burn after passing through it . See BURNING glass . All those rays cross the middle ray in the focus f , and then diverge from it to the contrary ...
Gyakori szavak és kifejezések
acid action ammonia angle animal appears axis benevolence body botany called calyx centre chyle circle class and order colour common compound connected consequently consists corolla degree distance distilled drupe Dubl earth ecliptic Edin effect employed equal Essential character feelings feet fixed flowers fluid fossil four genus give glass heat Hence ideas inches instrument iron ject Jussieu kind less Lond manner matter means ment metal mind Monogynia class motion mucilage muriatic acid Natural order nitre nitric acid object observed organs organzine oxide oxygen parabola parallel pass perpendicular person phosphorus piece plane plants Plate pleasures possess potash pounds principle produced proportion quantity racter Radix ratio rays receiver refraction screw seeds sensation sensible side solution species specific gravity square stances substances sulphur supposed surface term thing tincture tion Triandria tube vegetable vessels volatile weight