E-Storeformulas in optics
16 Apr 2007 11:09:13 IST
formulas in optics
some formulas in optics
1)
= 2pi (x) / lamda = phase diff. ................del. x is path diff.2)normal shift
S = t (1 - 1/
).....................( is not whole divided)
).....................( is not whole divided)Swater = t/4
Sglass = t/3
3)wen a lens is cut into 2 = parts perpendicular to its principal axis , focal length gets doubled and power gets halved
4)wen a lens is cut into 2 = parts parallel to its P. Axis , no change in focal length or power takes place
5)Goggles donot hav any power coz R1 = R2 = R for them
so p = ( - 1) (1/R1 - 1/R2)
- 1) (1/R1 - 1/R2)6)wen a lens is submerged in a denser medium its focal length inc and power dec.
7)wen a lens is submerged in water its focal length inc by 4 times and power dec. by 4 times
8)wen a lens is submerged in a medium of greater R.I then its nature reverses
9)Min. length of a plane mirror reqired to see full image of the object of ht. 'h' is h/2
10)* formula to calculate no. of images frmed b/w 2 mirrors is given by
n = 360/theta - 1
eg. if theta is 60.
then n = 5
Comments (19)
Orloff
Blazing goIITian
Joined: 25 Jan 2007 21:38:53 IST
Posts: 517
16 Apr 2007 11:16:09 IST
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Thanx a lot for posting them here....
16 Apr 2007 13:46:36 IST
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gud work himanshu...bt let me add sum more...
when some mirrors are placed parallel 2 each other then d second image in each mirror is the brightest...
if three mirrors are placed mutually perpendicular to each other then no of images formed is seven..
when some mirrors are placed parallel 2 each other then d second image in each mirror is the brightest...
if three mirrors are placed mutually perpendicular to each other then no of images formed is seven..
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