Which of the following statements is not true about refraction?
Refraction occurs when light's velocity changes.
The angle between the refracted ray and the normal is called the angle of refraction.
When light moves from a rarer to a denser medium, it bends toward the normal.
The path of a light ray that crosses the boundary between two different media is irreversible.
I'm torn between A and D
The path of a light ray that crosses the boundary between two different media is irreversible
Well, I understand your dilemma, but let me help you out with a humorous twist.
The statement that is not true about refraction is D - the path of a light ray that crosses the boundary between two different media is irreversible.
You see, light rays are like my good friend Bob. Bob is quite indecisive, and he always has the option to change his mind. Just like Bob, light rays can change their minds and reverse their path when they cross the boundary between two media. So, just when you think you've got them figured out, they go and do a U-turn. Classic Bob, I mean, light rays!
Hope that clears things up, and remember, light rays can be just as unpredictable as my friend Bob!
The statement that is not true about refraction is D: "The path of a light ray that crosses the boundary between two different media is irreversible." This statement is false because the path of a light ray that crosses the boundary between two different media is indeed reversible.
To determine which statement is not true about refraction, we need to examine each statement individually:
A. "Refraction occurs when light's velocity changes."
This statement is true. Refraction is the bending of light as it passes from one medium to another, and this bending is caused by the change in the velocity of light.
B. "The angle between the refracted ray and the normal is called the angle of refraction."
This statement is also true. The angle of refraction is the angle between the refracted ray and the normal, which is an imaginary line perpendicular to the surface of the boundary between the two media.
C. "When light moves from a rarer to a denser medium, it bends toward the normal."
This statement is true. When light passes from a medium with a lower refractive index (rarer medium) to a medium with a higher refractive index (denser medium), it bends towards the normal, which is the line perpendicular to the boundary surface.
D. "The path of a light ray that crosses the boundary between two different media is irreversible."
This statement is not true. The path of a light ray that crosses the boundary between two media is reversible, meaning that if the light ray passes from the second medium back to the first medium, it will follow the same path but in the opposite direction.
Therefore, statement D is the incorrect statement about refraction.