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Physics Refraction Question

Hi please could someone help me with this question, I am told to carry on the line XA and show it doesn't hit the eye, but I don't know where to draw my first normal. Here is the question
Capture.JPG
Thanks
Original post by HiThere8964
Hi please could someone help me with this question, I am told to carry on the line XA and show it doesn't hit the eye, but I don't know where to draw my first normal. Here is the question
Capture.JPG
Thanks

@The-Spartan
Original post by HiThere8964
Hi please could someone help me with this question, I am told to carry on the line XA and show it doesn't hit the eye, but I don't know where to draw my first normal. Here is the question
Capture.JPG
Thanks


Try drawing your first normal to the glass at the point where XA enters...
This diagram should help a little bit:

Spoiler

Original post by thefatone

Thanks :smile:
(edited 7 years ago)
Original post by The-Spartan
Try drawing your first normal to the glass at the point where XA enters...
This diagram should help a little bit:

Spoiler


Thanks :smile:


i can't see your picture....
Original post by thefatone
i can't see your picture....


Should be fixed now?
Strange. I could see it :confused:
Original post by The-Spartan
Should be fixed now?
Strange. I could see it :confused:


i don't .-.

maybe it's just me
Original post by thefatone
i don't .-.

maybe it's just me


Try this link for his image:

http://www.thestudentroom.co.uk/attachment.php?attachmentid=528011&d=1462295917
Original post by Calzs34


worked
Thanks for the help Spartan and Fatone, but if you look at the diagram I posted, The incedent ray hits the glass at the corner, which is why I was having trouble with it. I can do the other shapes and sides for other refraction questions just this one I had trouble with the first normal. Thanks anyway!!
Original post by HiThere8964
Thanks for the help Spartan and Fatone, but if you look at the diagram I posted, The incedent ray hits the glass at the corner, which is why I was having trouble with it. I can do the other shapes and sides for other refraction questions just this one I had trouble with the first normal. Thanks anyway!!


The first normal is always (at this level) perpendicular to the glass at the point the light enters :smile:
Basically in your example, the first normal can be thought to be the bottom the glass. Just draw in the angles and it works the same!
It's quite a nice question actually :yes:
No problem :biggrin:
Original post by The-Spartan
The first normal is always (at this level) perpendicular to the glass at the point the light enters :smile:
Basically in your example, the first normal can be thought to be the bottom the glass. Just draw in the angles and it works the same!
It's quite a nice question actually :yes:
No problem :biggrin:


Thanks so much again my friend. My idea was to do what you are suggesting, but I wasn't sure what I was doing, but now I have your reassurance.
Thanks again :smile:

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