What is meant by the "normal" to a surface?
A) a line perpendicular to the surface at a given point
B) the angle between the surface and the light ray
C) a line parallel to the surface at a given point
D) the direction of a reflected ray
Correct Answer:
Verified
Q38: The ideal shape for the primary mirror
Q39: The lens formula relating the image distance,p,to
Q40: A one-way mirror works because its surfaces
Q41: Why are optical fibers important for communication?
A)They
Q42: The sky is blue due to air
Q44: You see colors in a rainbow because
Q45: Optical fibers work because of
A)interference.
B)diffraction.
C)total internal reflection.
D)diffuse
Q46: You can see your image in a
Q47: In order to see a rainbow,the Sun
Q48: You do not see your image when
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