How will a light ray reflect if it heads directly at the focal point? A. The light ray will reflect parallel to the principal axis.

B. The light ray will bounce off at equal angles with the principal axis.

C. The light ray will reflect straight back on itself.

D. The light ray will reflect perpendicular to the principal axis.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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