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![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Apr 2008 19:59:01 IST
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if light enters from water to air at angle less than critical,then will all the rays get refracted or some may get also reflected..
asked in jee 2007...lil confused
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3 Apr 2008 20:04:21 IST
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well i think some will be reflected
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When there is no hope & everything in dark..........
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3 Apr 2008 20:04:49 IST
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y shud it get reflected.....
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3 Apr 2008 20:11:20 IST
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am i correct or wrong please tell me first
well i dont know reason well we had diagram in our theory books where some were reflected , u may also see the horizontal diagram given in the polriser in brewster law that made me say so
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When there is no hope & everything in dark..........
World says go & Graves say come.........
So never loose hope & Try another way.........
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3 Apr 2008 20:13:01 IST
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may be this is bcoz there is no surface which is perfect transparent to prevent reflection
these are my assumption dont take them as ultimate
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When there is no hope & everything in dark..........
World says go & Graves say come.........
So never loose hope & Try another way.........
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3 Apr 2008 23:34:01 IST
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yeah it does undergo partial reflection..even i thot of brewsters law..
but i need a convincing answer
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4 Apr 2008 00:13:25 IST
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when angle is less than critical angle, light is partially refracted and partially reflected...
but if its more than C, then its totally reflected....
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4 Apr 2008 10:02:52 IST
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yes that's right.. some part of the light gets refracted but most of it is reflected back into the denser medium.
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4 Apr 2008 10:49:09 IST
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but y ..
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4 Apr 2008 11:00:46 IST
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i think that's bcoz the angle is near critical so i think the ray won't show all props of critical angle ray so, some part of it is refracted.
U can also see the diagram in the cbse textbk if u like.. its given there in ray optics chapt.
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4 Apr 2008 11:07:58 IST
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yeah it is given in my 10th std. science text book 2 yrs ago..but the reason isnt specified...so weve gott to take it i suppose
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4 Apr 2008 12:26:17 IST
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some things are to be accepted...may be its one of them!
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4 Apr 2008 12:56:57 IST
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The Q is a very basic 1.
The ppl of reversibility is not true.
I remember there was a discussion in goiit. One member ( or expert ) said that he asked the Q personally to HCV .
The bottom line is that whenever light falls on the interface some portion is reflected and some portion is refracted. And conversely whenever light comes from denser to rarer medium , some portion is always refracted, even when is total internal refn.
The " total " is not really total.
plz note the words " at angle less than critical "
and here is the old discussion.
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it is not important where u stand, but in which direction u are moving |
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4 Apr 2008 21:20:37 IST
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yeah..but the total internal reflection the amount that is refracted is quite small...than the amount that is reflected when refraction takes place...
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