10 АНГЛІЙСЬКА КНИЖКИ ПОВ'ЯЗАНІ ІЗ «PRINCIPAL FOCUS»
Дізнайтеся про вживання
principal focus з наступної бібліографічної підбірки. Книжки пов'язані зі словом
principal focus та короткі уривки з них для забезпечення контексту його використання в англійська літературі.
Any group of parallel rays are converged to a focus by a converging lens, but
there is a special focus known as the principal focus of a lens. The ray diagrams
of fig. 3.5 explain the exact meaning of the principal focus and focal length of a
lens.
2
Cambridge IGCSE® Physics Coursebook with CD-ROM
b parallel rays focus parallel rays focus a Figure 13.16 The effect of a converging
lens on rays of light. a A converging lens makes parallel rays converge at the
principal focus. b Rays from the principal focus of a converging lens are turned
into ...
The principal focus (F) is a point on the principal axis where light comes to a
focus (for a converging lens) or appears to be diverging from (for a diverging lens
). Two foci exist, equidistant on either side of the iens, since light behaves the
same ...
4
Physics for AQA.: Separate award
We saw on pages 1 84 and 1 85 how the fact that a converging lens forms an
image of a distant object at its principal focus can be used to measure the focal
length of the lens. The ray diagram in Figure 2 shows how this works. The image
is ...
Ann Fullick, Patrick Fullick, 2001
5
System of Natural Philosophy
is concave and the rays are diverging, the radiant may be either in the principal
focus, or more remote than the principal focus, or nearer than the principal focus.
And, when the mirrour is convex and the rays are converging, the imaginary ...
6
Mechanics. Optics.-v. 2. Hydrostatics. Astronomy
Is concave and the rays are diverging, the radiant may be either in the principal
focus, or more remote than the principal focus, or nearer tlian the principal focus.
And, when the mirrour is convex and the rays are converging, the imaginary
focus ...
7
Competition Science Vision
Note : (1) Optical centre divides the thickness of the lens in the ratio of the radii of
curvature of its surface. (2) For thin lens, the optical centre coincides with the
geometric centre of the lens. 5. Principal focus (F1 and F) : The point situated on
the ...
8
The Ophthalmic Review: A Quarterly Journal of Ophthalmic ...
Rays whose lines of direction before the first refraction pass through the first
principal focus, proceed parallel to the axis, after passing through the last surface
. If rays proceed parallel to the axis before the first refraction, their lines of
direction ...
9
Comprehensive Physics XII
When object is at infinity, the image is formed at the principal focus i.e., when u =
-°°,v l l KNOWLEDGE PLUS If Rj and It, are numerically equal (say, equal to R),
then f {R -R) R m Case of a glass lens immersed in a liquid 1 .J 1 1 R., or or f fa • If
...
10
Textbook of Ophthalmology
The principal focus of a concave mirror is that point on the principal axis where
light rays traveling parallel to the principal axis converge after reflection. Its focal
length is the distance between the principal focus and the pole of the mirror and
is ...
H. V. Nema, Nitin Nema, 2011
НОВИНИ ІЗ ТЕРМІНОМ «PRINCIPAL FOCUS»
Дізнайтеся, що обговорювала національна та міжнародна преса, і як термін
principal focus вживається в контексті наступних новин.
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