Glossary entry

French term or phrase:

l\'angle défini entre la normale à l\'objet analysé

English translation:

the angle between the ray of light and the normal to the object

Added to glossary by Louisa Tchaicha
Jul 16, 2010 16:03
13 yrs ago
French term

l'angle défini entre la normale à l'objet analysé

French to English Tech/Engineering Patents mesure spatio-colorimétr
Hi,

Plus l'angle définie entre la normale à l'objet analysé et le rayon lumineux émis est important, plus la quantité de lumière réfléchie, dans le cadre d'une réflexion diffuse, diminue
My attempt:
the more the defined angle between la normale with respect to the analyzed object and the emitted luminous ray is great, the more the quantity of reflected light, within the scope of a scattered reflection, lessens

I thought that "à la normale" was "perpendicularly" but I don't see how it could fit in this context

Any ideas?
Thank you

Discussion

Louisa Tchaicha (asker) Jul 17, 2010:
Thanks chris, I always get stuck on how tyo translate it :)
chris collister Jul 16, 2010:
What is "Normal"? A "normal" is a very common word in mathematics and physics, used to describe an imaginary line extending (either inwards or outwards) from a line, curve or surface. Its base is perpendicular to the tangent to the line or curve, or to the tangent plane for a surface, so eg all normals to the surface of the (perfectly spherical) Earth would meet at a point in the centre.

Proposed translations

+4
9 mins
Selected

the angle between the ray of light and the normal to the object

Yes, it makes perfect sense: the 'normal' is the line sticking out perpendicular to the surface of the object, as you say; and what is of interest is the angle of incidence of the light, which is measured with respect to the normal, rather than the surface.

--------------------------------------------------
Note added at 17 mins (2010-07-16 16:20:38 GMT)
--------------------------------------------------

If the angle of incidence is 0°, i.e. the light is hitting the surface square on, then the illumination is maximum; as the angle of incidence increases, so the illumination falls off.
Note from asker:
Thank you Tony M
Peer comment(s):

agree Joanne Archambault : you are right on Tony (with your answer and explanation)
19 mins
Thanks, Joanne! I've done quite a bit of work in optics... ;-)
agree chris collister : Yes indeed! Though I wonder why the inversion from "the angle between A and B" to "the angle between B and A"? Not that it makes any difference, of course...
1 hr
Thanks, Chris! Just because I didn't like the sound of 'the angle between the normal to...'
agree Nils Andersson
1 hr
Thanks, Nils!
agree rkillings
1 hr
Thanks, R!
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Thank you so much for your help!"
6 mins
French term (edited): l'angle définie entre la normale à l'objet analysé

the angle (defined) between the perpendicular angle at the analysed object

l'angle définie entre la normale à l'objet analysé
=
the angle (defined) between the perpendicular angle at the analysed object

--------------------------------------------------
Note added at 9 mins (2010-07-16 16:12:17 GMT)
--------------------------------------------------

Plus l'angle définie entre la normale à l'objet analysé et le rayon lumineux émis est important
=
The greater the angle (defined) between the perpendicular angle at the analysed object and the ray of light produced
Note from asker:
Thank you Chris Hall
Something went wrong...
+1
1 hr

angle of incidence

Angle d'incidence: angle formé par le rayon incident (projeté) et la perpendiculaire à la surface rencontrée.

--------------------------------------------------
Note added at 1 heure (2010-07-16 17:26:05 GMT)
--------------------------------------------------

The angle of incidence is the angle that light is striking a surface.
Note from asker:
Thank you kashew
Peer comment(s):

neutral Tony M : That's certainly an explanation, but not really the translation to fit in here, I think.
5 mins
but it is concise!
agree Hilary Wilson
25 mins
Thanks
Something went wrong...
Term search
  • All of ProZ.com
  • Term search
  • Jobs
  • Forums
  • Multiple search