critical angle of a substance is 30degree ,what is its refractive index?
485679
refractive index = 1 / sin of critical angle\nrefractive index is 1 / sin30\n1/1/2\n=2
1030265
a=c*sin(30)=.5c since it is apposite the 30 degree angle\nb=sqrt(c^2-a^2)= .866c\nor b=c*cos(30)=.866c\n\na=b=c*sin(45)=.707c=
465115
The equation is just for the angle of a particular wavelength. Not for resolution. Say 250nm,300nm look like 2 lines and not one. \nI think you want to look up diffraction limits. \nSimple experiment is to compare a CD rom and DVD see how they split wavelengths.
865033
okay. so. there's a special set of rules for a 30-60-90 triangle.\n\nthe sides are proportional to each other by the ratio \n\nx : v/( 3)x : 2x\n\nwhere the v/ is the square root.\n\nthat means that the greatest angle corresponds to the greatest length.\n\nbecause the longest side is 7.5 meters, that means that is 2x.\n\ndivide by two for x, and that is the 30* length. (because its the smallest angle, therefore is opposite the smallest length)
339882
By snells law:\n\n(n1) Sin(Angle Of Incidence) = (n2) Sin(Angle Of Refraction)\n\nPut Angle of Incidence to be 0.\nYou will find the Angle of Refraction to be zero too.
875835
OD=E*d*C\n\nWhere OD=optical density\nE the molar extinction coefficient\nd the length of the path of the light through the solution (width of the cuvette)\nC the concentration in mole/L of the solute.\n\nYou need d and C as well to get E.\nThis is a fair approximation especially for student problems.\n\nIn reality if you wanted to find E, you would do a standard curve by measuring the OD of samples of known concentration.\nThen you would use linear regression to find the equation of the curve and from its slope you would calculate E (slope=E*d)\n\nA good standard curve and thus accurate calculation requires care to ensure the accuracy of the standards, several points (ideally 9 at least) and being within the linear are of the method.\nThe region of highest accuracy is 0.2-0.8. You can go even below or above this range (though not above 1.0) but this is the range where the photometric error is minimal.
522069
well.. refractive index is a function of frequency
443794
30 degrees or pi/6 radians
951198
^ Parasite alert LOL! ^\n\n30 s for C to move from A to B, maybe? I'll assume that. Also, x seems to be a length, not an angle. Maybe a) is asking for the rate of change of z (called z')? We know the angular rate of C about O (y') is pi/30 (answer to b)), and triangle CAO is isosceles, so z'=-0.5*pi/30. \nFor c), circumferential velocity is pi*r/30. Angle CAO is, conveniently, 45 deg, so x' = sqrt(0.5)*circumferential velocity.\nFor d), the area of triangle OAC is .5*AO*altitude, and altitude=r*sin(y). This is a maximum when y (not x) =pi/2.\nSorry, I know you wanted  no answers, but I couldn't see how/where to stop short of most of the answers.
110612
2x\nwhen the side opposite the 30 degree angle is x\nand the side opp the 60 degree angle is x(root3)
628550
same angle degree, same lenght of a side.
727712
Speed of Light in Air = 2.99792458 X 10^8m/s\n\nTo get the refractive index,take the speed of light in air divide by the speed of the in another medium.\n\nHence is (2.99792458 X 10^8)/(2.5 X 10^8) = 1.2(approximate)
642439
I assume that the light enters water through the glass since incidence is less than refracted angle also assuming refrative index of glass as 1.66 and water as 1.33\n\nWhat is the question then ? Also how can light return to where it originates ? That is dependent on the setup.
536617
As the pole and its shadows are of the same length, we can let this value be x.\n\nopposite = length of the pole\nadjacent = shadow of the pole\n\ntan A = opp/adj = x/x = 1\nA = 45 degrees\n\nwhere A = angle of elevation
535452
simple  for smooth surfaces, the angle of incidence is equal to the angle of reflection\nso the angle of reflection is going to be the same angle mentioned in the question
774526
On a smooth surface, the angle of reflection will be the same as the angle of incidence.\n\nTherefore, the answer is (B) 40 degrees.
75862
prism. \n\n(polarizer - phase shift; lens - angle of relection,refraction; analyzer - phase)