wavelength and refraction?

[refenestration]

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The question asks: In two separate experiments, monochromatic beams
of red and violet light are shone upon a thin film (n =
1.3). Which color of light is deflected the farthest
from its original path upon entering the film?

The correct answer is supposedly "Both rays are deflected by the same amount" because, the explanation states, "The angle of refraction has no dependence AT ALL upon the wavelength of the light" emphasis all mine. now there are plenty of sources that state that the index decreases as the wavelength increases. am i missing something? wouldnt equal degree of refraction eliminate any possibility of chromatic diffraction?

 

[RogueUnicorn]

wavelength does affect diffraction, you are correct, the book/whatever is wrong.

 

[refenestration]

considering that it's kaplan its pretty disheartening

 

[RogueUnicorn]

i read this wrong. depending on the context it might not make a difference. could you post up the whole thing

 

[Doodl3s]

yea, i hate questions like this, because its like ASSUMING the ideal gas situation... Here you ASSUME ideal refraction...

yes, diff Wavelengths DO refract at different N values.... which cause a prism to do what it does....

however its stating the n=1.3... and in real life the difference between the two wavelengths is like 1.31 vs. 1.30....

IDEALLY, if n=1.3 for something, ALL LIGHT refracts at n=1.3

theres no wavelength in n sin(theta)=n sin(theta)

 

[refenestration]

oh i see lol. thnx a lot for the help.

 

[zmatrix]

I think Kaplan's butt is covered because they put in "thin film" which I take to mean negligible thickness. Just like diffraction through a prism, the thicker the prism the more pronounced the diffraction. Negligible thickness = Negligible diffraction

 

[refenestration]

I think Kaplan's butt is covered because they put in "thin film" which I take to mean negligible thickness. Just like diffraction through a prism, the thicker the prism the more pronounced the diffraction. Negligible thickness = Negligible diffraction

thats actually a very helpful fact, thnx

 

[alfalfa1]

It was my understanding that in general, the higher the frequency then the more the light will be refracted. Is this correct?

And I just want to confirm refraction vs diffraction.

Refraction is when the light travels travels from a low index of refraction to a high index of refraction causing the light to bend.

Diffraction is when the light hits something (or goes through a slit) and the resulting rays are propogated in various directions.

Correct?

 

[inaccensa]

It was my understanding that in general, the higher the frequency then the more the light will be refracted. Is this correct?
yes.
And I just want to confirm refraction vs diffraction.

Refraction is when the light travels travels from a low index of refraction to a high index of refraction causing the light to bend.
or viceversa. It is due to change in index of refraction

Diffraction is when the light hits something (or goes through a slit) and the resulting rays are propogated in various directions.
Correct?

It doesn't necessarily involve a change in the index of medium