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Author Topic: What is the advantage of using a plane mirror in optical testing?  (Read 18526 times)

Offline miss_maple

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state one advantage of using a plane mirror in optical testing .  [B)]

♥ miss maple =)


[MOD - please phrase subject headings as questions in future.]
« Last Edit: 11/12/2008 09:53:53 by chris »


 

paul.fr

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ermmm, you have either misstyped the url, and hoped for www.thenakedhomework.com or you just need to try and disguise you questions so they dont look like you want your homework done.
 

Offline dentstudent

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state one advantage of using a plane mirror in optical testing .


You get to see your reflection at 30,000 ft
 

Offline Don_1

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During woodwork class at school about hurumph years ago, the teacher (affectionately known as Wally Woodworm) asked me to go the other woodwork classroom and ask the teacher there for a Viscount plane. I fell for it! Off I troted and made myself look a complete twit.


Vickers Viscount c.1960
 

paul.fr

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could have been worse, you could have been sent for a long stand or a bag of hot air for the hand dryer.
 

Offline RD

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Physics Qns
« Reply #5 on: 11/12/2008 09:54:59 »
The bastard file was always popular in the metalwork class.
 
 

lyner

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You boys!
 

Offline Don_1

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You boys!

Considering your little picture, shouldn't that read "you bouys"?
 

Offline miss_maple

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ermmm, you have either misstyped the url, and hoped for newbielink:http://www.thenakedhomework.com [nonactive] or you just need to try and disguise you questions so they dont look like you want your homework done.

hey !!! wad h/w ? it isnt a h/w . i saw it in my txtbk & was figuring out the ans !
*roll eyes*
 

Offline miss_maple

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During woodwork class at school about hurumph years ago, the teacher (affectionately known as Wally Woodworm) asked me to go the other woodwork classroom and ask the teacher there for a Viscount plane. I fell for it! Off I troted and made myself look a complete twit.


Vickers Viscount c.1960

wads that to do with my qns ?? *confused look*
 

Offline dentstudent

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miss_maple. Hello! There appears to be a problem with your keyboard!

(thr apprs 2b a pblm wth Ur kybrd)

Thts fnny, mnes bggrd 2!
 

Offline dentstudent

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It's a pun, you see, or a "play on words". "Plane mirror", yes? The answer is in the question.
 

lyner

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You boys!

Considering your little picture, shouldn't that read "you bouys"?
A bleedin' comedian, is it that you are?
 

Offline miss_maple

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wth.everyone in this world is confusing me =/
can i like get a proper ans &&

miss_maple. Hello! There appears to be a problem with your keyboard!

(thr apprs 2b a pblm wth Ur kybrd)

Thts fnny, mnes bggrd 2!

there isnt anything wrong with my keyboard =>
 

Offline LeeE

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If you expect to get an answer that makes sense you need to ask the question in a language that's understood by the people you're asking.

Despite the fact that there are only twenty six letters in the English alphabet, there isn't actually a shortage of them as each one can be used an unlimited number of times, and in any order.  Even better still, most of the hard work of choosing which combinations of letters to use, to make words, has already been done for you, so all you have to do is choose the right words from the ones that have already been developed and which are in common use to convey the meaning of what you say.

Although this may just seem to make a message longer, it can also offer benefits by clarifying the meaning of the message, by making small differences in meaning much greater and thus making them easier to see.  I think this may answer your question.
 

Offline miss_maple

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*roll eyes *
i typed out exactly what was written in my textbook ! how am i suppose to know what they want exactly ???
 

Offline Chemistry4me

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Just how old are you exactly miss_maple?
 

paul.fr

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miss_maple. Hello! There appears to be a problem with your keyboard!

(thr apprs 2b a pblm wth Ur kybrd)

Thts fnny, mnes bggrd 2!

perhaps there is an online teenage text to FOG English translator, somewehere on the net.
 

Offline dentstudent

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*roll eyes *
i typed out exactly what was written in my textbook ! how am i suppose to know what they want exactly ???

Which textbook would that be?
 

Offline Chemistry4me

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What's a plane mirror? Is it just a fancy way of saying mirror??
 

lyner

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A plane mirror is totally flat, not curved - convex or concave.
 

Offline Soul Surfer

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miss_maple 

The words in your textbook may represent the "right answer" but your teacher probably already knows what was written in your text book and copying that out does not prove that you really understand the question and the answer so what you are expected to do is write out the reasons in your own words very different from those in the text book explaining it as clearly as possible.  This does of course assume that you understand both the question and the answer!

I have never come across this question before and can think of some likely answers but the sort of answer your teacher might expect depends on the level and context of what you are currently being taught and so just giving you an answer may not be a good idea.  Please explain and expand the context of the question and what you were learning and I will attempt to give you a better answer.
« Last Edit: 17/12/2008 18:14:44 by Soul Surfer »
 

Offline LeeE

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I believe that I have already answered the original question, albeit in a very allegorical style, in the final paragraph of my first post in this thread.

Actually, it's not a bad question because it does need a little thought to recognise the obvious.
 

lyner

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I think the question was referring to 'eye testing'.
There are two advantages in using a mirror (plane, usually).
Firstly, the operator can change the chart and play with the prescription in the test glasses in the same place (the chart can be placed just behind the person being tested).
Secondly, the room only needs to be half the length of the full distance needed for viewing the test chart because the image depth is the same as the object distance.
 

Offline Bored chemist

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A third advantage is that the eye test chart has to be a mirror image so it's less likely that people will  "remember" what it says rather than read it.
 

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