chooae the right answer Q12 Optical: A fine light beam reaches the water surface of an aquarium at an angle of 45° (Fig

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chooae the right answer
Q12
Optical:
A fine light beam reaches the water surface of an aquarium at an
angle of 45° (Figure opposite). The refracted ray touches a
horizontal mirror at the bottom of the aquarium which reflects it
towards the surface of the water where it is refracted when passing
through the air (index n₁=1). The refractive index of water is n =
1.33.
What angle is measured between the incident ray and the ray
leaving the water?

Chooae The Right Answer Q12 Optical A Fine Light Beam Reaches The Water Surface Of An Aquarium At An Angle Of 45 Fig 1 (92.85 KiB) Viewed 36 times

Optique: Un faisceau lumineux fin atteint la surface d'eau d'un aquarium sous un angle de 45°(Figure ci-contre). Le rayon réfracté touche au fond de l'aquarium un miroir horizontal qui le réfléchit vers la surface de l'eau où il est réfracté lors du passage dans l'air (indice n₁=1). L'indice de réfraction de l'eau vaut n = 1,33. Quel angle mesure-t-on entre le rayon incident et le rayon sortant de l'eau ? rayon incident normale milieu 1 = air 45° surface de séparation milieu 2 = eau Miroir 0⁰ 45⁰ 75⁰ 90⁰