What is the optical axis? - Socratic
2017年2月26日 · Optical axis of a lens is an imaginary straight line which passes through the geometrical center of a lens joining the two centers of curvature of surfaces of lens. It is also called principal axis of the lens. As shown in the figure above, R_1 and R_2 are centers of curvature of of two surfaces. Straight line joining these two is the optical axis. A ray of light …
What happens to a light ray traveling parallel to the optical axis of …
2016年4月11日 · Also called Principal axis. As shown in the ray diagram above; all rays, except one, which are parallel to the optical axis, while passing through the lens are refracted and thereafter pass through the Principal Focus F on the other side of the lens. Exception is the ray which passes through the optical center. This ray does not get refracted. It crosses the lens …
What is the critical angle of an optical fiber when cladding is …
2014年12月13日 · 1 Answer. The critical angle of a fiber of core (for example, Flint glass) of refractive index 1,62 and cladding of index 1,49 should be 66,89°. Considering the fact that on the interface between the two media the incoming ray (inside the core) must be refracted parallel to the interface we can use Snell's Law to calculate the angle at which ...
An object 25 cm tall is placed 80 cm in front of a convex ... - Socratic
2017年4月2日 · I tried this: Consider the diagram: Where: o=0.8m=object distance; i=image distance; f=r/2=1.5/2=0.75m=focal length. BUT, this focal length is "inside" the mirror in the virtual region so it will be NEGATIVE (this is a convention for the virtual side). We can use the relationship: 1/o +1/f=1/f or: 1/0.8+1/i=-1/0.75 rearranging: i=-0.4m This wil be a VIRTUAL …
Diastereomers - Organic Chemistry - Socratic
By definition a diastereomer is any stereoisomer that is not an enantiomer. Consider the possible optical isomers of 2,3-dichlorobutane. There are two chiral carbons, so there are 22 = 4 possible optical isomers. However, two of the structures are identical. They are the same meso compound.
If an object is placed 25.0 cm from a concave mirror whose
2014年4月30日 · For this question, we need to use the mirror formula 1/f= 1/d_o +1/d_i . What the problem gives us is: f = 5.0 cm, and d_o = 25.0 cm. So we are solving for d_i. Isolating the unknown to its own side of the equation, in this case by subtracting 1/d_i from both sides, will accomplish this. 1/d_i = 1/f − 1/d_o 1/d_i = 1/5 − 1/25. FInd a common denominator. 1/d_i = …
Chiral and Achiral Molecules - Organic Chemistry - Socratic
2015年1月3日 · A molecule is considered chiral if there exists another molecule that is of identical composition but which is arranged in a non-superposable mirror image. Also the presence of an asymmetric carbon atom is often the feature that causes chirality in molecules. Two mirror images of a chiral molecule are called enantiomers or optical isomers.
How do I find the major and minor axes of an ellipse? - Socratic
2015年3月7日 · And vice versa. From standard form for the equation of an ellipse: (x − h)2 a2 + (y − k)2 b2 = 1. The center of the ellipse is (h,k) The major axis of the ellipse has length = the larger of 2a or 2b and the minor axis has length = the smaller. If a> b then the major axis of the ellipse is parallel to the x -axis (and, the minor axis is ...
Finding R and S for Chiral Centers - Organic Chemistry - Socratic
Mika · 1 · Dec 16 2014. R and S are labels assigned to the stereocenters of a molecule. To easily find the R and S centers, label the four bonded molecules 1 to 4 in order of atomic number. Place the 4 molecule in the back of the chiral center and then in a clockwise (R) or counterclockwise (S) direction label the bonds with atoms 1, 2, 3.
Meso Compounds - Organic Chemistry - Socratic
2015年10月3日 · A meso compound is a compound that contains two or more chiral centres but is optically inactive. It has an internal plane of symmetry and we can superimpose it on its own mirror image. To identify a chiral compound, you look for two or more chiral centres and an internal plane of symmetry. cis -1,2-dichlorocyclohexane is a meso compound.