Light which strikes a mirror at a 30 degree angle of incidence will reflect at an angle to the perpendicular of
(A) 60 degrees.
(B) 90 degrees.
(C) 45 degrees.
(D) 30 degrees.
Light which strikes a mirror at a 30 degree angle of incidence will reflect at an angle to the perpendicular of
(A) 60 degrees. --- No.
Both angles are measured from the perpendicular.
Light which strikes a mirror at a 30 degree angle of incidence will reflect at an angle to the perpendicular of
(B) 90 degrees. --- No.
That would make it parallel to the surface.
Light which strikes a mirror at a 30 degree angle of incidence will reflect at an angle to the perpendicular of
(C) 45 degrees. --- No.
Angle of reflection = angle of incidence.
Light which strikes a mirror at a 30 degree angle of incidence will reflect at an angle to the perpendicular of
(D) 30 degrees. --- Yes.
Angle of reflection = angle of incidence.
Which of the following surfaces would most likely be a diffuse reflector?
(A) Cotton cloth
(B) A water surface.
(C) A polished metal surface.
(D) A window pane.
Which of the following surfaces would most likely be a diffuse reflector?
(A) Cotton cloth --- Yes.
It is a rough surface and will scatter light.
Which of the following surfaces would most likely be a diffuse reflector?
(B) A water surface. --- No.
Usually that would be smooth and a specular reflector.
Which of the following surfaces would most likely be a diffuse reflector?
(C) A polished metal surface. --- No.
That will give equal-angle reflections only.
Which of the following surfaces would most likely be a diffuse reflector?
(D) A window pane. --- No.
What light reflects does so by the equal angle law.
(A) aim directly at where you see it.
(B) aim above where you see it.
(C) aim below where you see it.
(D) aim beside where you see it.
(A) aim directly at where you see it.
No. --- Refraction at the surface shifts the image.
(B) aim above where you see it.
No. --- Light from the fish bends away from the normal.
(C) aim below where you see it.
Yes. --- The image is high because light bends away from the normal.
(D) aim beside where you see it.
No. --- The refracted ray is in the same plane as the incident and normal.
(A) From the outside at a 45 degree angle of incidence.
(B) From the inside at a 45 degree angle of incidence.
(C) From the outside at a 40 degree angle of incidence.
(D) From the inside at a 40 degree angle of incidence.
(A) From the outside at a 45 degree angle of incidence.
No. --- Only light from the slower medium is reflected totally.
(B) From the inside at a 45 degree angle of incidence.
Yes. --- Angle of incidence greater than the critical angle.
(C) From the outside at a 40 degree angle of incidence.
No. --- Only light from the slower medium is reflected totally.
(D) From the inside at a 40 degree angle of incidence.
No. --- The angle of incidence must exceed the critical angle.