| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Jan 2007 20:18:41 IST
|
|
|
when a light enters a rarer medium from denser medium,the ray gets refracted. if angle of incidence(i) is increased r increases and at a particular angle it grazes the surface i.e at critical angle(c).if i>c no more refraction. only reflection takes place.why can't the angle be in the range (i,r)?
|
sona |
|
|
|
23 Jan 2007 20:45:20 IST
|
|
|
Well you are talking about the phenomenon of TOTAL INTERNAL REFLECTION.
You are also asking about the range of angle. I think here by angle you mean incident angle. You can cange incident angle but to a certain extent only.
the maximum angle of incidence can be = i = 90.
And if you try to increase beyond this then the incident ray is going to change its medium, that is for angles i < 90 if incident ray travels from denser to rarer medium and if you try to increase i beyond 90 this will simply not be possible as incident ray will change the medium without actually travelling and there is violation of the condition required for TOTAL INTERNAL REFLECTION to take place, I suppose you are able to visualise the situation. Thus there is a limit to the range of angle of incidence too.
|
The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
24 Jan 2007 21:35:52 IST
|
|
|
It is also practically observed during experimentation that if i>c TIR occurs. The answer for 'why' for this fact can be explained from the wavefronts (Huygens principle) of wave optics
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jan 2007 19:21:11 IST
|
|
|
what is a caustic curve?
|
ppg |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
